18G7.] MU. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 933 



Fam. Pectinid.e. 

 12S. Pecten tegula. 



Ostrea tegula. Wood, Index Test. Snpp. p. 7, pi. 2; Reeve, Conch. 

 Icon. pi. 30. f. 136. 



This fine species is distinguished hy the irregular foliaceous scales 

 that ornament the ribs. It varies considerably in colour, from yel- 

 lowish orange, purplish grey, and dull red, to a fine rich chocolate- 

 brown, with whitish scratch-like lines towards the umbones. Found 

 amongst rocks and under stones at low water in Port Jackson. 

 Length 2| inches. It is also met with at Moreton Bay and New 

 Caledonia. 



129. VOLA FUMATA. 



Pecten fumatus. Reeve, Conch. Icon. Fecten, pi. 7. f. 32. 



The right valve is very convex and broadly ribbed ; and the left 

 valve concavely flattened, rayed with twelve narrow, raised, rather 

 distant ribs, and immersed in the right valve. The deep smoky- 

 purple colouring and the produced recurved beak of the right valve 

 are peculiar. Dredged in sandy mud in Lane Cove and Middle 

 Harbour. Length 3j inches. 



Fam. Radulid^. 



130. Radula lima. 



Ostrea lima, Linn. 



Lima squamosa. Lam. ; Sow. Thes. Conch, pi. 21. f. 17, 18. 



This widely distributed species is not uncommon amongst rocks 

 and under stones at low water in Port Jackson, and at Wollongong 

 and Port Stephen, &c. Length 2 inches. 



131. Radula (Limatula) bullata. 



Ostrea bullata, Born. 



Lima fragilis (var. b). Lam. ; Sow. Gen. of Shells, f. 3. 



A narrow, inflated, nearly equilateral, white shell, longitudinally 

 ridged, with the^ ears almost equal. Under large stones and slabs 

 of rock at low water in Watson's Bay and Middle Harbour &c. 

 Length \\ inch. 



The animals of L. bullata form a sort of nest amongst the frag- 

 ments of broken shells and corals in the rock-pools, where they 

 dwell gregariously. 



Fam. Anomiid^. 



132. Placunanomia (Monia) ione. 



Placunanomia ione. Gray. 



This fine species differs from P. macrochisma, Desh. (from the 

 Gulf of Tartary), in having the plug large and triangular. It is 

 found attached to the under surface of rocks at low water near Port- 



