TELLIDORA. 



401 



grandis, Hanley. 

 guberuaculurn, Hanley. 

 irnrnaculata, Phil. 

 inconspicua, Brocl. and Soiv. 

 inoruata, Hanley. 

 irus, Hanley. 

 lata, Gmel. 

 lilium, Hanley. 

 lucerna, Hanley. 

 Mazatlauica, Desh. 

 Middendorffii, Desh. 

 moesta, Desh. 

 Moretonensis, Desh. 

 nasuta, Conr. 

 nobilis, Hanley. 

 nymphalis, Hanley. 

 obliquaria, Desh. 



oblonga, Gmel. 

 Pacifica, Conr. 

 pellucens, Desh. 

 pellucida, Phil. 

 petalum, Valeric. 

 plebeia, Hanley. 

 proxiina, Brown. 

 secta, Conr. 

 solidula, Pultn. 

 sordida, Couth. 

 tenuis, Da Costa. 

 Siiessoni, Morch. 

 truncata, Jonas. 

 truncatella, Desh. 

 urnbonella, Lam. 

 veutricosa, Desh. 



Genus TELLIDORA, Morch. 



Shell triangular, very inequivalve, the right valve con- 

 cave ; surface of valves plicate ; beaks acute, laterally in- 

 curved ; lateral slopes strongly produced and dentate at their 

 edges. Hinge with two primary teeth in one valve, and one 

 in the other ; lateral teeth two in each valve. 



Ex. T. Burnettii, Broderip and Sowerby, pi. 104, fig. 

 3, 3, a. 



The shells included in this genus constitute a very pecu- 

 liar form of TellifiidcB, having the aspect of a Myodora, but 

 with the teeth of the hinge as in Tellina. The two recent 

 species known are from West Columbia, Mazatlan, and the 

 Gulf of California ; there is an extinct species (Tellina 

 lunula t a) from the Pleistocene beds of South Carolina. 



Species of Tellidora. 

 Burnettii, Brod. and Sow. crystallina, Chem. 



