SHELLS. 253 



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



Dieffenbach. 



Shell subcordate, rather ventricose, thin, rosy white, varied 

 with red ; hinge, margin, and two centrical rays bright, with 

 numerous, 60 or 65 narrow, rather nodulose ribs, hinder slope 

 slightly flattened ; inside white, varied with bright red. 

 Described from a single valve; probably young. 



Fam. TELLINID^E. 



179. Psamnobia Stangeri. Gray, n. s. 

 Inhab. New Zealand. 



Shell oblong, solid, rounded in front, and rather obliquely trun- 

 cated behind ; greyish, with purple rays, slightly concentrically 

 striated, more deeply in front, inner surface and fulcrum of hinge 

 purple; teeth large. 



Very like P. vespestina in appearance \ the hinder slope of both 

 valves are equally smooth, the syphonal inflection reaches to some 

 distance before the umbo. 



The younger shells are covered with a smooth brown periostraca 

 and are generally deeper purple within, and redder externally; some 

 are orange, and others whitish within. 



Named in honour of my friend Dr. Stanger, who kindly pre- 

 sented these and other New Zealand specimens to the Museum, 

 and who is well known for the arduous duties that devolved on him 

 during the return of the expedition of the African Society. 



I have seen this shell named B. Tongana, Quoy, but it is much 

 higher than his figure. 



180. Psammotia nitida. 

 Inhab. New Zealand. 



Shell oval, oblong, thin, pellucid, porous, rounded in front and 

 rather tapering behind, covered with a hard polished horn-coloured 

 periostraca ; inner surface purplish white, or purple ; hinge teeth 

 small. 



This shell is allied to Psammotia flavicans, Lam. (which is also 

 Sanguinolaria livida and P. alba, Lam.), but is not so high nor 

 produced below, and is thinner, and the syphonal inflection is not 

 quite so much produced towards the front edge. 



181. Psammobia lineolata. Gray. Yate's New Zealand, 

 App. P. livida. Lam. 17? 



Inhab. East Coast. Yate. 



Shell oblong, transverse, compressed, obliquely truncated be- 



