SHELLS. 257 



194. Lucina divaricata. Lam. '27. Tellina divaricata. 

 Linn, 



Inhab. New Zealand. 



"They live about a spade deep (10 inches) in the sand on the 

 coast, and are not common." Bidwell. 



This is one of the generally-spread species of Mollusca, being 

 found on the shores of Europe, India, Africa, America, and Aus- 

 tralia. 



Fam. UNIONIM. 



195. Umo Menziesii. Gray, n. s. 



Inhab. New Zealand. Rivers in the N. Island and 

 Lake Taupo. Dr. Dieffenbach. 



Shell oblong, high, compressed, thin, obliquely truncated be- 

 hind ; covered with a thin olive periostraca, and much excoriated 

 near the umbo. The hinder lateral teeth elongated, only elevated 

 on their hinder extremity, where they are crowded; the inner 

 anterior tooth of the right valve large, thick, ovate, rugose ; the 

 rest small, compressed ; the disk of the shell brown, varied. 



Var. Shell elongate, lower, rather produced, and rounder be- 

 hind ; the hinder part of the posterior lateral teeth straight. 



Named in honour of the late Mr. Archibald Menzies, F.L.S., 

 who accompanied Captain Vancouver, as surgeon, in his expedition. 



196. Unto Aucklandica. 



Inhab. New Zealand, Bay of Islands, and Auckland, 

 in the Bay of Amabrusa. Dr. Sinclair. 



Shell oblong and rather thick, rounded in front, and rather 

 obliquely truncated behind, covered with a thick olive periostraca ; 

 umbo black, decorticated, cardinal teeth low, blunt, oblique, hinder 

 lateral teeth laminar, far off; the inner surface pearly, purplish 

 near the umbo, greenish on the hinder edge. 



The inner surface of the shell (dead ones ?) is often so exfoli- 

 ated that scarcely any thing but the periostraca remains, so that 

 the shells can be bent about in any direction when wet. 



Fam. ARCADE. 



19?. PecLunculus laiicoatatus. Quoy ct Gaim. Voy. 

 Astrol. iii. 466, t. 77, f. 4-6. Pectmiculus ovatus. 

 Quoy et Gaim. Voy. Astrol. iii. 467, t. 77, f. 1-3. 

 Inhab. New Zealand. 



Regular when young, becoming thicker, higher, and more or less 

 VOL. n. s 



