Other Molluscs: Septifer - very abundant; Modiolus (?philippinarum); Barbatia fusca; B. ?helblingii?; ?Chryastoma? zeus - on weedy rock; D. folium; Bulla (large heavy); white drupe/coralliophyllid on corals; H. roei & Colisella? (large acmeid) on (crest) reef; Ophiurid; few tellinids mostly small in sand (only found dead shells in patches of shell & shell grit - ?voided by fish.); Pseudocopagia victoriae - single dead valves; white Isognomon; piece of pinnid shell - ?Pinna; Clay saw two Melo with spines.
[sketch of diving area]
[Shopping/calls etc in afteronoon]
Wed 16-iii
Departed early for dive - approx. WSW of jetty where broken reef/weed bank is separated from reef proper - adjacent to break in reef. [sketch of diving area].
Plenty of small->medium O. tuberculata on isolated bombies (depth 2-4m.) in from reef. Fair number of D. folium under ledges of reef - particularly S of break, depth ? 2m.
[Travel to Geraldton]
Thurs 17-iii
[...] Greg came with us to dive on reef off Point Moore. Dived on inner edge adjacent to Point & out to boat channel into Harbour through Devils' Gate. Shallow sea grass or weed beds - diversity of weed (much Cystophora) - on flats. Reef was abundantly algal covered with holes to about 2m - edges were undercut. Plenty of crayfish - found only one oyster. Plenty of Bellostrea tentariformis, Marmarostoma pulcher, & few Ninella whitleyi (which I hadn't noticed at Port Gregory) & Tectus pyramis. Few Dicathais, v, few trochids on weed, plenty of columbellids on weed. Few malleids/isognomids on cove walls. A diversity of corals though colonies were not very large nor abundant. Went out to look at reef offshore for diving -  could not find sharp drop-off shown on chart. -appeared to be to within 5m of surface - kelp covered. Decided not to dive. [Collected luggage, had meals etc]
Fri 18-iii
[...] We launched boat in harbour & went out to Irwin Reef at N end adjacent to channel - spent some time looking around - met up with crayboat who said he would guide us to edge of reef - instead took us to shallowest part. Clay cut a rope which was around his propellor & they left. We decided to dive in this area to south of shallowest areas shown on chart. Clay & Charlie dived first - I was boaline[?] & then Clay came back & I went in. Magnificent country - weed covered - mostly Sargassium but holes & ledges everywhere. Top of reef was at about 6-7 meters & holes were another 1-2m. This is a sponge workers paradise - so beautiful under ledges - every colour & form- & also abundant ascidians. A great density & variety of coral in these dips & ledges, and very abundant O. tuberculata on almost all species of coral. Often the coral - faviids, meandrine. Turbinaria, Montifera etc formed plates - often on bases of holes. Areas around edges of coral were often sandy (possibly because of protection afforded by coral) & coral edges extended out just above this sand - where oysters (O. tuberculata) were found in this position, the coral & so the oysters was tipped up so that the lip of the oysters was up away from the sand [sketch]. Found 1 large oyster ? Hyotissa sp (2pp) & some ded & possibly 1 living D. folium in caves. V few malleids found in caves - not very many Septifer evident. Found 1 Haliotis elegans under a corallum of a ?Leptophyllia? - quite large. Saw - but didn't collect "Phyllidia" as at Pt Gregory - & purple white & roange & red nudibranch.
Sat 19-iii
Port Denison (White Tops). Port Denison -> Dongara -> Sandy Bay -> Jurien Bay [...]
Set off early to White Tops Reef - S of Port Denision & inshore from S end of Irwin Reef. Dived on SW corner of reef where chart shows greatest drop-off. However situation much less suitabel for corals etc & much more suitable for plants. To S&W of corner bottom appears to be a plain of sand well marked by ripple marks. <1' apart & running roughly in a N/S direction - very little evidence of infaunal bivalves - probably too mobile - certainly coarse sand. Back to N & E fairly steep slope from few low isolated outcrops - in places fair amount of coral - some fairly large bombies. Oysters sparse (nothing but O tuberculata found). Dead Dinassovica live Marmarostoma pulcher & Ninella torquata. Slate pencil sea urchins. No star fish. Fairly smooth Acropora. On upper part of slope - much kelp & fucoids. Went in to shallows where low swell breaking - snorkled - Clay found 3 mod large Hyotissa - no tuberculata. Very little coral except for Pocillopora & few small colonies in pools - rarely over edge. - Heliocidaris common. 
[Travel to Jurien Bay]
Sun-iii
Jurien Bay - outside
Early in morning, wind strong & uncertain, waited for it to drop - processed oysters (live). Went out in boat to outer reef - roughly north of Escape Island. On outer side is drop from about 15' to 40' with swell breaking on shallows. Anchored on drop-off just where swell was rising. I acted as boatman - while Clay & Charlie did first dive. I went in later (with Clay). - ledge heading to east- exposed rock with undercuts - broken into boulders - again marvelous for sponges & ascidians & also bryozoa - very little coral. Starfish - yellow with small black spots & Pentagonaster - slate pencil sea urchins. Found one small basket star on sponge - Clay found one on coral. No oysters. [Returned to process material]
Mon 21-iii
[Notes on morning activites, phone calls etc] 
Decided that there was no point in going further south. - no new species of coral turning up (rather reducing in diversity) & also density decreasing. Also oysters becoming harder to find. So decided that we would return to Geraldton & investigate possibility of going to Abrolhos. [Shopping for supplies/ travel to Geraldton]
Tues 22-iii
[Personal activities in Geraldton]
Wed 23-iii
After a reasonable night's sleep got up at 4.35 & managed to catch boat at 5.00am. Dived off reef beyond Station's toilet - twice in afternoon. 
Thursday 24-iii
Early breakfast - Carrier boat in at 7.00am - began dive off toilet at about 8.30 - went straight down & to east - quite different from area to west - steeper slope - much larger fan-shaped colonies of Acropora & Pachyseris. Plenty of Hyotissa (probably H. hyotis though juvenile) & also dark[?] shelled D. folium though many were dead - not bored - not crushed. In early afternoon snorkled to SW of island in lagoonal area off point & S. Bay - over to edge of deep hole - small Trochus (Trochus) sp on dead staghorn Acropora or among dead bases of living Acropora - various spp. Plenty of pteriids on Acropora spp - live (spat also found). Very few Dendostrea sp. on dead Acropora - or else (or as well as) very hard to find - all found were very small. Favites abdita, Montipora, Goniastrea pectinata, G. australiensis, Cyphostrea, Favia. 
Fri 25-iii-83
Went diving down sleop into Goss Passage about 8.30 or so. Looking for Hyotissa sp. (2 promyal passages).
[Rear of book: accounts and expenses]