156 MR. G. F, ANGAS ON THE MARINE [Jan. 24, 
Island, Port Lincoln, and Encounter Bay, and presents every di- 
versity of shore, from bold rocky headlands to sandy flats and muddy 
estuaries. Within this area there have been collected already up- 
wards of 230 species of univalves and about 100 species of bivalves, 
all of which are now described ; but, doubtless, when the dredge has 
been more generally used, and the coasts better explored, these 
numbers will be greatly increased. 
Sixty-five of the species enumerated in the following list were 
unknown to science until described from my specimens, during the 
last eighteen months, by Messrs. H. & A. Adams, H. Crosse, my- 
self, and others; to these will be added somewhere about a dozen 
new species of bivalves, in the second part of this paper. 
The coasts of South Australia are particularly rich in Trochide, 
of which family no less than fifty species are included in this list. 
No large species of Terebra have as yet been found, and only one of 
the subgenus Euryta. According to our present knowledge, the 
genera Dolium, Strombus, Solarium, Trichotropis, Struthiolaria, 
Ovulum, Aporrhais, Terebellum, and Dentalium do not appear to 
be represented at all; while we have numerous species of the follow- 
ing genera, viz. Voluta, Columbella, Fusus, Cominella, Triton, Ha- 
liotis, Fissurella, and Chiton. Amongst the Chitonide is a new 
form—Stenochiton (Ad. & Ang.). There are four species of Sca- 
laria, three of Conus, five of Cyprea, and only one Oliva. The 
Pleurotomide are pretty numerous; and many others will probably 
be discovered when dredging has been better attended to, as this 
family belongs more especially to deep water. Of the genus Stpho- 
naria there are four or five species. 
Amongst the bivalves, the truly Australian genera Myadora and 
Chamostrea yield one species each. The Veneride are tolerably 
abundant, including the lovely VY. Jamellata. So are the Mactride 
and Tellinide, of which there are several species inhabiting the 
sandy shores of the gulfs and Encounter Bay, amongst which the 
handsome Tellinu albinella is the most conspicuous and abundant. 
Pecten bifrons, Solemya australis, Sunetta alicia, and Crassatella 
castanea are all interesting South-Australian species. No examples 
of the genus J’rigonia have yet been met with. Both the edible and 
pearl oysters occur plentifully near Port Lincoln; and the Pinna 
abounds on the sandy and muddy flats at the heads of the gulfs, . 
CEPHALOPODA. 
Fam. ARGONAUTID. 
1. ARGONAUTA ORYZATA. 
Argonauta oryzata, Meuschen, Mus. Gevers. 252. n. 133. 
A. tuberculata, Shaw, Nat. Mise. xxiii. t. 995. 
A. tuberculosa, Lam. Anim. sans Vert. vii. 632, pl. 2. 
A. nodosa, Solander, MS., Portland Cat. 76. 2120. 17. 
Hab. Spencer’s Gulf and Kangaroo Island. 
At certain seasons of the year, during the prevalence of strong 
