134 DIM Y AIR A. 



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

 Psammobia, and not being twisted marks them from the Tellina ; the valves 

 being close, and their anterior having fasical muscular impressions, render 

 them distinct from the Lucina. 



Tellinides 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. In- 

 habits the Bay of Naples. 



Genus 38. — TELLINA. — Linnaus. 



Generic Character. — Transverse or orbicular ; both valves 

 generally flattened ; the anterior side angular, and inflexed on 

 the margin with a flexuous irregular band ; with one or two pri- 

 mary 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 serrated 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. 

 fig. 11. Oval, flat, pointed at the smaller end, and slightly re- 

 flected ; pale yellowish, faintly striated concentrically ; covered 

 with a pale brown transparent epidermis. One inch and three 

 quarters broad. Inhabits the Mediterranean sea. 



*** Solenaires. 



Genus 39.— P S A MMO TiE A Lamarck. 



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

 slightly gaping at the sides ; each valve with a single primary 

 tooth, sometimes in one valve only ; ligament external, attached 

 to callosities at the hinge, and without the irregular plait of the 

 Tellina. They appear like degenerated Psammobia. 



Psammotcea violacea. — The Variegated Psammot^sia. 

 Plate XVII. fig. 13. Transversely ovate-oblong, sub-ventri- 

 cose ; radiated with purple •, transversely striated. Two inches 

 broad. Inhabits the Australian seas. 



