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



Subfam. Donacin^. 



53. DoNAx (Latona) deltoides. 



Donax deltoides, Lam. Anim. sans Vert. vi. p. 241. 



D. epidermia. Lam.; Reeve, Couch. Icon. Donax, pi. \.f.4a,b. 



This fine species is abundant on most of the sandy beaches of 

 Australia which are exposed to the surf. It ranges from Swan 

 River to Moreton Bay. In colour it varies from greenish olive to 

 purple, and sometimes orange-yellow. Outer Manly Beach, in sand 

 at low water. Length 2^ inches. 



Subfam. PaphiinjE. 



54. DONACILLA ELONGATA. 



Mesodesma elongata, Desh. ; Reeve, Conch. Icon. Mesodesma, 

 pi. 1. f. 5. 



Triangularly elongated, and at the posterior side short and trun- 

 cated ; covered with a shining yellowish- olive epidermis. Buried in 

 sand at low tide. Botany Bay. Length 1 inch I line. This species 

 has a wide range to South Australia, Tasmania, and Swan River. 



55. *DoNACILLA OBTUSA. 



Mesodesma obtusa, Crosse & Fischer, Journal de Conch. 1864, 

 p. 350. 



An ovate species, of a waxy white, roundly truncate behind, and 

 compressed and wedge-shaped in front, with a light-brown epidermis 

 towards the margins. From the Sand-spit, Middle Harbour. 

 Length 9 lines. This species is common at Port Lincoln, in South 

 Australia. 



Fam. VeneridjE. 

 Subfam. Venerin^e. 



56. Venus laqueata. 



Venus laqueata, Sow. Thes. Conch, xi. pi. 153. f. 15; Reeve, 

 Couch. Icon. Venus, pi. 6. f. 20. 



This noble species is characterized by the concentric ridges form- 

 ing erect crenated frills, the interstices between which are regularly 

 longitudinally ribbed. Colour pale fulvous, sometimes rayed with 

 four indistinct brown bands. Dredged in sandy mud in Port Jack- 

 sou. Length 3 inches. Found also at Moretou Bay. 



57. Chione striatissima, 



Venus striatissima, Sow. Thes. Conch, p. 44, pi. 157. f. 103-105; 

 Reeve, Conch. Icon. Venus, pi. 26. f. 135. 



A pretty little pointed ovate species, cancellated with concentric 

 waved ridges and longitudinal striae ; in general aspect somewhat 

 like the British V. ovata, Penu. Dredged at Watson's Bay «&c. 

 Length 8 lines. 



