152 DIMYARIA. 



Genus 37.— TELLINIDES — Lamarck. 



Gmeric Character. — Transverse, inequilateral, flattened, 

 a little gaping laterally ; beaks small, and sub-depressed ; 

 margin ^plain, irregular, but not inflected ; two divergent 

 primary teeth in each valve, and two lateral teeth, which are 

 somewhat obsolete, in one valve. 



The want of lateral teeth distinguishes the shells of this genus from 

 Psammobia, and their not being twisted from Tellina ; the valves being 

 close, and their interior having fascial muscular impressions, render 

 them distinct from the Lucina 



TelUnides rosea. — The Roseate Tellinides. Plate 

 XVII. fig. 10. Ovate, oblique, polished, thin, and of a 

 beautiful rosy hue ; slightly wrinkled transversely. Half an 

 inch broad. Inhabits the bay of Naples. 



Genus 38 TELLINA — Linnceus. 



Generic Character. — Transverse or orbicular; both valves 

 generally flattened ; the anterior side angular, and inflexed 

 on the margin, or marked with a flexuous irregular plait ; 

 with one or two primary teeth in the same valve, and two 

 lateral teeth, frequently remote ; edge of the front side of 

 either valve, in some species provided with a row of ser- 

 rated teeth, extending from the apex to the margin ; ligament 

 external. 



There are two sections of this genus :— * Transversely oblong ; and, 

 •* Orbicular. 



Tellina depressa. — The Depressed Tellina. Plate 

 XVII. tig. 11. Oval, flat, pointed at the smaller end, and 

 slightly reflected; pale yellowish, faintly striated concentri- 

 cally ; covered with a pale brown transparent epidermis. 

 One inch and three-quarters broad. Inhabits the Mediter- 

 ranean sea. 



** Solenaria. 



Genus 39 PSAMMOT^A.— Za?ncrcy^. 



Generic Character. — Transverse, ovate, or oblong-ovate; 



