924 MR, G. F. ANGAS ON AUSTRALIAN MOLLUSCA. [NoV. 28, 



China seas, in wliicli the prevailing colour of the valves is greenish 

 olive, passing into purple on the ventral margins, where alone the 

 zigzag markings are visible. The dorsal area is strongly crossed with 

 purple lines. Dredged in mud in the Parramatta River. Length 

 2 inches. 



75. Tapes turgida. 



Venus titi'ffida, Lam. Anim. sans Vert. vi. p. 353. 



? Tajjes titrffidula, Desh. P. Z. S. 1853, p. 8. 



A fine species, more or less finely concentrically ribbed, of a pale 

 brown colour, ornamented with zigzag purplish lines, or three faint 

 bands. Length 3^ inches. In mud at low water. Middle Harbour, 

 Rose Bay, and Parramatta River. 



7G. RUPELLARIA MITIS. 



Venerupis mitis, Desh. P. Z. S. 1853, p. 5. 



A small species, not unlike V. irus of Europe. Length 8 lines. 

 Botany Bay. 



77. RuPELLARIA CRENATA. 



Venerupis crenata. Lam. Anim. sans Vert. vi. p. 164. 



A fine species, imbricately sculptured, and laminately frilled at the 

 posterior side. It may be recognized by its peculiar chalky appear- 

 ance blotched here and there with pale lilac. Found in crevices of 

 rocks at low water in various bays in Port Jackson. It occurs also 

 in Tasmania, and in South Australia, at the roots of mangrove trees. 

 Length \h inch. 



Fam. Petricolid.e. 



78. *Choristodon rxjbiginosum. 



Naranio rubiginosa, A. Ad. & Ang. P. Z. S. 18G3, p. 425, pi. 37. 

 f. 17. 



This very interesting species is a thin ventrlcose shell, finely di- 

 varicately sculptured, rayed with brown and purple at the umbones, 

 passing into white towards the ventral margin. I only obtained one 

 living specimen and a single valve; the former was enclosed in a 

 nodule of clay, dredged at 4 fathoms in Watson's Bay, Port Jackson. 

 Length 10 lines. 



Fam. GLAUCONOMYIDiE. 



79. Glauconomya angulata. 



Glauconome angulata, Reeve, P. Z. S. 1844 ; Conch. Icon. Glaii' 

 conome, pi. 1. f. 5. 



A much smaller species than G. ritgosa, Ilanley (which is found 

 at Moreton Bay), in which the green epidermis is peculiarly shri- 

 velled and wrinkled in the middle, whilst in G. angulata it lies in 

 ridges parallel to the lines of growth. From sandy mud at low water. 



