656 MR. G. F. ANGAS ON THE MARINE [Nov. 14, 
Fam. PECTINID. 
88. PrcTEN AUSTRALIS. 
Pecten australis, Sow. Thesaurus Conch. i. p. 76, pl. 19. f. 210 
& 220. 
? P. asperrimus, Lam. 
Station. On sandy banks amongst ooze, and in sponge, 2 to 5 
fathoms. 
Hab. St. Vincent’s and Spencer’s Gulfs; at Hardwick Bay, large; 
also King George’s Sound and Swan River, Western Australia. 
Like many of the species of this genus, P. australis is very vari- 
able in colour: dark violet-brown or orange-rose are its prevailing 
tints, but occasionally specimens are found of a bright scarlet, and 
also of a peculiar vivid lemon-yellow. The large specimens from 
Hardwick Bay are curiously like P. asperrimus, Lam. ; but after 
comparing a series I should hardly like to separate them, the tripar- 
tite character of the ribs being visible in all. 
89. Pecren (CHLAMYS) BIFRONS. 
Pecten bifrons, Lam. Anim. sans Vert. (Desh. edit.) vii. p. 131. 
Station. Deep water, on oyster-banks. 
Hab. Port Lincoln, Port Adelaide, and Kangaroo Island. 
This fine species is more or less of a lilac-bloom colour, ribbed 
with dark purple or rose, whilst the interior is universally of an in- 
tense purple throughout. The granular shagreen character of the 
valves is peculiar. 
90. VoLA LATICOSTATA. 
Pecten laticostatus, Gray, Yates’s ‘ New Zealand,’ Appendix. 
Station. In deep sheltered bays. 
Hab. Port Lincoln. 
This species is without doubt the P. laticostatus of Gray, from 
New Zealand. The ribs of the right valve are broad, flatly convex, 
and smooth, as in P. medius, Lam., to which it is closely allied. 
Fam. RADULIDA. 
91. RADULA LIMA. 
Ostrea lima, Linn. 
Lima squamosa, Lam.; Sow. Thes. Conch. pl. 21. f. 17, 18. 
Station. In sponges and clefts of rocks, deep water. 
Hab. Rapid Bay. 
92. RapuLta (MANTELLUM) ANGULATA. 
Lima angulata, Sow. Thesaurus Conch. p. 86, pl. 22. f. 39, 40. 
Station. Deep water. 
Hab. Port Lincoln. 
93. RapuLa (LIMATULA) BULLATA. 
Lima bullata, Sow. Genera of Shells, f. 3. 
