Mollusca in the Collection of the Zoological Society. 363 



Tellina kdentula. 



T. testa obovatd, antice longiore, postice subangulatd ; valvis concen- 

 trice striatls, alhicantihiis ; ligamento magno ; dentibiis cardinali- 

 hus ohsoletis, lateralibus nullis ; long. 2 1\, lot. i^, alt. 2, poll. 

 Hab. in Oceano Boreali. 



Shell rather inequivalve, with a dull whitish, concentrically striated 

 surface. From Behring's Straits. 



Tellina alternidentata. 



T. testd oblongd, compressd, antice rotundatd, postice subacuminatd 

 dentibus in iitrdque valvd duobus, altera simplici, altera bicuspi- 

 dato, alternatim inter se insertis ; lang% 2-j%, lat. tV, alt. lyV» 

 poll. 

 Hab. in Oceano Arctico. 



From Icy Cape. A thin, greenish, very fugacious epidermis coats 

 this shell when in its young state ; when full grown, however, only some 

 small remains of this are to be observed near the edges. There are no 

 lateral teeth. 



Tellina inconspicua. 

 T. testd abavatd, sublenticulari, antice breviore ; ligamento magnOy 

 dentibus cardinalibus parvis, lateralibus nullis ; long. -^, lat. y%, 

 alt. A-i, poll. 

 Hab. in Oceano Arctico. 



From Icy Cape. It bears a general resemblance to Tellina solidula, 

 but it has not the acuminated posterior extremity of that species. A thin 

 corneous epidermis is observable on the lower edges, but the umbones 

 are eroded, and a great part of the surface has a chalky appearance. The 

 remains of the dried animal were still within the shells from which this 

 description was made. We have only seen two specimens, one of which 

 is colourless, the other has a flesh-coloured surface with darker umbones. 



*Tellinides purpureus. 

 T. testd oblongd, compressd, subcequilateraU, concinne decussatd, latere 

 pastico subacuminato, leriter emarginato ; long. '2,j^^, lat. tV» ^^t' 

 l?o' poll. 

 Hab. ad littora Oceani Pacifici. 



