r- 
The South Australian Naturalist. 43 
company. The remarkable twisting and turnings of its thin 
;a4 valves render it a difficult subject to open alive without injury. 
An easy plan is to expose it to the sun for a period, then place 
o: it in water, when the muscles relax naturally. Searching among 
sk the weeds numbers oi smaller shells are to be found living. Can- 
Jii thandes bell ulu s , its beautiful iridescent sheen; Bittium law- 
iD leyannvu Phasm-nella. Thalotia conica, Columhella, Mitra 
ti glabra, Gena nigra (like a miniature Haliotls) and possibly’ a Lyria 
aa witraeformis may be secured. This latter shell, which is allied to 
I the Volute family, is beautifully colored when taken alive, very 
t diflerent from the beach-rolled specimens commonly picked up. 
As the tide commences to rise again over this bank the collector 
it must, perforce, take to the boat, loth to leave such a rich collec- 
i ting ground. 
iri 
^ DREDGING, St. VINCENT’S GULF, DECEMBER 12 1925 
i By F. T . 
, Members of ihc V.K. Society were fortunate in having an excellent day 
for dredging— calm se;u warm sun._ and light hree/.es. Many present wer'e 
enabled to see. for the first time, specimens of marine life of great interest fresh 
rom then* native liaunts — and also to. have them described hv the leaders 
irulessor licirvey Johnston and Mr. H. M. Hale. 
Drifting slowly, a few miles out. in a few fathoms of water over a 
smooth, sandy hotLom. the two dredges soon collected a mass of seaweeds 
sponges, corals, sliclls, crustaceans, starfish, aseidian.s iish. ^tc and those 
niterc,sted in any of these forms liad identy of material (o work on, 
ihc Family Pecten or Scallop Shell. 
hUrons. Cldamys aspnrimus, Pectn, medms, 
H,re noticed. Chamys hyyons, tlic six'cihc name indicates '^double face,” both 
I'ilhtT appearance, and coloration. When 
vL of ■■eddish-brorvn, indicative of (he omament.al, polbhed interior. 
he the valve.s open, die spaced roues of ininulc blue eve.s (ocelli) on the 
Pn sooio Perlnts the ocelli number up to 
liLcteri-d " niolhuscan eyes liave many 
c laracterKstics of the vertebrate type. .At least thev are well able to distine 
ad light from shade. ()n dissecting a number of C. hifrons it was noticed 
t/ice T Vos'aoean lay hidden in (he mantle folds, in almost every in- 
‘"“"r 
Pinnoteres Subglobosa. 
some hivih". 'Vlf ‘’'T parasites, between the mantles of 
inme f ,l l" '' ■'^S^^totle found speeimens in the Pinna, hence the generic 
th“p,Wirto'f’' ''"yVp h'uards the Pinna.” The ancients supposed 
his she I to I V" 'T stupid beast, and that the little crabs lived inside 
and so «• ^ r ^ frcndly nip when a fi.sh swam beween the gaping valves, 
nd ts cZm l “ l-'-gyptians used tV Pinna 
friends >'ieroglyphcs to symbolize the need man has of 
LA 
