107 



150. Malleus tulsellatus, Lamarck, An. s. Vert , vi. r 

 p. 145; M. albus, Lamarck; ilf. normalis, Lamk. ; Ostrect regida r 

 Eorskal. 



Buried in sand in a few fathoms water, St. Vincent Gulf ; 

 Port Lincoln; dead shells, Fowler's Bay, Wallaroo Bay; 

 widely diffused in Australia ; Timor, China, &c, to the Red 

 Sea. 



151. Pinna inermis, Tate, antea, p. 71, t. 4, f . 5 ; P. Zey- 

 lanica, Angas, P. Z. S., 1865, p. 655 (noti Gray). 



Partially buried vertically in mud or sand in a few fathoms 

 water, St. Vincent Gulf, and general from Eucla to the South- 

 East coast. 



This shell, locally known as " razor-fish," is wedge shaped, 

 somewhat roundly acuminate posteriorly, and otherwise differs 

 from P. Zeylanica by the absence of scaly ribs. Attains to a 

 length of about eighteen inches. 



152. Vulsella oyata, Lamarck, An. s. Vert., vi., p. 222; 

 Y. Tasmanica, V. limceformis, and V. rudis, all of Reeve, Mon. 

 Vulsella. 



Immersed in sponge from shallow water to 32 fathoms ; 

 common throughout the whole coast line ; also West Australia, 

 Tasmania, and New South Wales. 



Very variable in shape, pale horn coloured ; concentric lira), 

 fringed with minute flattened scales. 



153. Avicula Georgiana, Quoy and Gaimard, Zool. Voyage- 

 Astrolabe, vol. 3, p. 457, t. 77, f . 10-11, 1835 ; A. scalpta,. 

 A. pulchella, A. nitila, and A. punctulata, all of Eeeve, Mon. 

 Avicula. Possibly A. papilionacea, Chemnitz. 



Affixed to seaweed. Very general. Extends from King 

 George Sound (Quoy and Gaimard') to New South Wales. 

 Locally called "butterfly shells." 



The above-quoted species-names of Reeve have been founded 

 on individual variations in colour and colour markings. 



Transparent, varying in colour from pellucid white, brown, 

 green, with or without coloured rays or spots ; length, about 

 one inch. 



154. Meleagrina margaritifera, Linnaeus (Mytilus), Syst. 

 ]Sat. ; Lamarck, An. s. Vert, vi., p. 151. 



" Deep water, Spencer Gulf, Coffin Bay, and the Great Aus- 

 tralian Bight. This is the 'pearl oyster,' a species generally 

 distributed throughout the Indo-Pacific marine molluscan pro- 

 vince " (Angas). A very rare species, I have seen only one- 

 South Australian example, and that voung, in the cabinet of 

 Mr. Bednall. 



