| OCR Text |
Show 930 MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. [Nov. 28, Fam. VULSELLID.E. 111. VULSELLA TASMANICA. Vulsella tasmanica, Reeve, Conch. Icon. Vulsella, pl. 1. f. 3. A rusty-brown species of irregular growth, covered with minute flattened scales arranged in concentric ridges. In sponges &c, Port Jackson. Length 1 inch. Fam. MODIOLARCID^E. 112. MODIOLARCA SUBTORTA. Modiolarca subtorta, Dunker, P. Z. S. 1856, p. 365. Modiola subtorta, Reeve, Conch. Icon. pl. 10. f. 70. A small, brown, trapezoid shell, with the valves unequal and slightly twisted. Cook's River, Botany Bay. Length 4 lines. Fam. AvicuLiDiE. 113. AviCULA PULCHELLA. Avicula pulchella, Reeve, Conch. Icon. Avicula, pl. 8. f. 22. A semitransparent, horny species, painted with more or less interrupted reddish flames radiating from the umbones. Attached to sea-weed, in deep water, Botany Bay and Middle Harbour. Length 1 inch. 114. MARGARITIFERA FIMBRIATA. Avicula fimbriata, Reeve, Conch. Icon. Avicula, pl. 9. f. 25. A very variable species, both in colour and sculpture. Sometimes it is nearly smooth, at others broadly furbelowed towards the margin with long spout-shaped laminar scales. It is flattened, very broad at the upper part, and squarely ovate. The colour varies from dark horn or purple to whitish, more or less rayed with irregular purple bands and blotches. The interior is brilliantly nacreous. The Avicula placunoides, Reeve (Conch. Icon. pl. 17. t. 68), is probably only a variety of this species. Found under pieces of rock at low water, at Middle Harbour and Watson's Bay. Length 3 inches. 115. MALLEUS ALBUS. Ostrea malleus-albus, Chem. The ordinary " Hammer-oyster " of Australia, which ranges from Port Lincoln to Moreton Bay. It occurs on the sandy flats in Broken Bay; and I obtained a young specimen in Middle Harbour, Port Jackson. 116. PINNA ZEYLANICA. Pinna zeylanica, Gray, Appendix to Dieffenbach's Travels. This common Australian species is found at Brisbane Water. |
