42 CO^CHYLlX—niTHYRA. 13. 



13. F A^OP MX— LA3IARCK. 



Testa transversa, tequivalvis, lateribus ineBqualiter hiantibus. 

 Cardo dente unico eonico in tttrdque valvd et hinc calhim > 

 breve ascendens non exsertum : lateralibus nullis. Liyamen- 

 tum externnm, callis nffixum. 



Shell transverse, equivalve, unequally open at the sides. Hinge 

 with a single conic tooth in each valve, and a short ascending 

 callosity on one side which is not exserted : lateral teeth none. 

 Ligament external, fixed to the callosities. 



Glytymeiis. PanoP^A. 



^' Mya Glycyraeris. Gmelin, Syst. p. 3222. 



Ttirton, Linn. Syst. iv. p. 178. 

 Chemnitz, vi. p. 33, tab. 3, fig. 25. 

 Pennant, Brit. Zool. iv. p. 160. 

 Donovan, British Shells, iv. tab. 143. 

 3Iontagu, Test. Brit. Suppl. p. 19. 

 Liiun. Trans, viii. p. 34. 

 Turton, British Fauna, p. 146. 



Wood, Conch, p. 114, tab. 25, fig. I. 

 Dillwyn, Descript. Catal. p. 41. 



Turton, Conch, Diet. p. 107. 

 Chama Glycymeris. Lister, Conch, tab. 414, fig. 258. 



Admitted among the British shells, by Donovan, in conse- 

 quence of its having been taken once on the Dogger bank. And 

 after a severe gale, we once found, on the beach at Teignmouth, 

 the fragment of a large valve, which from it« tooth and ligament 

 appeared to belong to this genus. 



