252 FAUNA OF NEW ZEALAND. 



Fam. MESODESMID^E. 



174. Mesodesma Chemnitzii. Desk., Enc. Meth. ii., 443. 

 Quoy et Gaim. Voy. Astrol. iii., 504, t. 82, f. 9-] 1. 

 Mya Nome Zelandise. Chemn. vi., t. 3, f. 19-20. 

 Paphies roissyana. Lesson, Voy. Coq. ii., 424,, t. 

 15, f. 4. Mya Australis. GmeL, 3221. Mactra 

 Australis. Wood's Cat., f. 24. Machsena ovata, and 

 M. subtriangulata. Leach, MSS., Brit. Mus. 



Inhabits New Zealand. Chemn. Tasman's Bay. Quoy. 

 Called Pipes by the natives, who eat them as food. They are 

 very abundant at the Bay of Islands, in brackish water. Dr. 

 Sinclair. Everywhere. Dr. Dieffenbach. 



175. Mesodesma ventricosa. Gray, n. s. 



Inhabits New Zealand, North Shore, Cook's Straits. 

 Dr. Dieffenbach. 



Shell ovate, wedge-shaped, truncated behind, thin, ventricose, 

 opake-white, smooth, slightly concentrically striated ; covered with 

 a thin, nearly transparent, horn-coloured periostraca, edge thin. 

 The lateral teeth short, smooth, compressed, close to the cartilage 

 pit, the front one of the left valve the largest. The syphonal in- 

 flection does not reach to quite the centre of the disk. 



Like the American cuneiform species, but shorter, higher, 

 thinner, and more ventricose, and the teeth different. 



176. Mesodesma subtriangulata. Erycina subtriangu- 

 lata. Gray. Ann. Phil. 



Inhabits New Zealand, West Coast, N. Island. Dr. 

 Dieffenbach. 



SAXICAVID^E. 



177- Hiatella Minuta. Solen minutus. Linn. 



Lam. Hiatella arctica. Lam. Donax rhomboides. 

 Poli. Saxicava rhomboides. Desk. 

 Inhabits New Zealand. 



I can see no character by which I can separate the two New 

 Zealand specimens I have seen from the English specimens. It 

 appears to differ from S. Australis, Lam. 



Fam. CARDIADA:. 

 178. Cardium pulcliellum. Gray, n. s. 



