254 FAUNA OF NEW ZEALAND. 



hind, purplish rosy, with rather darker concentric belts, and very 

 thin anastomosing, radiating lines. 



182. Tellina alba. Quoy et Gaim. Voy. Astrol. iii. 



500, t. 81, f. 1-3. 

 Inhab. Tasman's Bay. 



183. Tellina lactea. Quoy et Gaim. Voy. Astrol. iii. 



501, t. 81, f. 14-16. 



Inhab. Tasman's Bay. Quoy. Wain^aroa, N. Island. 

 Dr. Dieffenbach. 



This shell, often rosy externally and yellow within, and covered 

 with a pale brown periostraca; it differs considerably in the height, 

 width, and convexity of the specimens. 



There are two distinct varieties from different parts of the 

 island : one short, high, and swollen in front, like Quoy's figure ; 

 the other comparatively longer, and more compressed. 



" They live among stones about low-water mark, and at least as 

 far as three fathoms deep. 



" The animal is very small, and has a small foot. The tubes are 

 6 or 8 inches long, reaching to the surface of the sand. They lie 

 horizontally in the sand with the left or flattest valves beneath." 

 Dr. Stanger. 



Fam. PHOLAD.E. 



184. Barnia similis. Gray. Pholas similis, Gray. Yates 

 New Zealand, App. 



Inhab. East Coast. Yate. 



Shell oblong, rather elongate, acute in front, tapering behind, 

 with rather close concentric laminae ; the anterior part with rather 

 close and radiating grooves ; hinge margin reflexed, simple be- 

 neath ; dorsal plate single, elongate, acute in front, truncated 

 behind ; very like Pholas parvus t but larger, broader, and more 

 acute in front. 



185. Talona tridens. Gray. 



Inhab. New Zealand, in limestone. Bidwell. 

 Shell ovate, with a deep central groove ; the front half with 

 closed, waved, concentric ridges; the hinder half with distant 

 regular concentric grooves. The front gape large, broad, ovate, 

 at length closed up; the two hinder processes forming together a 

 cup about as long as broad, each furnished with a submarginal 

 and central rib. 



