OF CONCnOLOGY. 73 



two cardinal teeth united above; anterior one falcate, -witli a pit 

 on each side ; posterior one curved and directed obliquely back- 

 ward. 



T. PARiLis. PL 3, fig. 12. 



Description. — Suborbicular or subovate, inequilateral, ventri- 

 cose ; umbo prominent; posterior end acutely rounded ; ventral 

 margin profoundly curved ; surface entire. 



Locality. — Iladdonfield, N. J. 



It is thin and fragile, and exteriorly so closely resembles the 

 genus 3Iysia (^Diplodonta) that I so referred it in the Journal of 

 the Acad. Nat. Sci., vol. vi, pi. 46, fig. 10. 



ASTARTE, Sowerby. 



A. ? STAMINEA, Conrad. 



Description. — Oval, elevated, inequilateral ; beak slightly 

 prominent, acute; disk very minutely and densely striated con- 

 centrically ; end margins obtusely rounded. 



Locality. — Ripley Co., Miss. 



Journal Acad. Nat. Sci., vol. vi, pi. 46, fig. 8. 



TELLIMERA, Conrad. 



A more perfect hinge of the left valve of this genus gives the 

 following character : Cardinal teeth two ; anterior one v-shaped, 

 nearly direct, or slightly directed anteriorly; the posterior tooth 

 bifid, oblique ; posterior lobe thick, and longer than the anterior 

 lobe ; cardinal plate comparatively broad laterally, posteriorly 

 channeled ; anteriorly with a small pit, apparently for the recep- 

 tion of a lateral tooth. 



This genus was originally made a subgenus of Tellina, under 

 the name of Telliiiimera. I have shortened this name in the 

 genus, and in its present form it constitutes a proper name of 

 Greek origin. 



T. EBOREA, Conrad. PI. fig. Journ. Acad. Nat. Sciences, 

 vol. iv, p. 278, pi. 46, fig. 14. Type. 



LINEARIA, Conrad. 



This genus was described in the Journal of the Acad. Nat. 

 Sciences, vol. vi, p. 279. At that time I had not seen the hinge 

 of the right valve, which has since been obtained in the Iladdon- 

 field marl. The hinge shows two small, diverging, nearly equal 

 teeth, directed obliquely forward, the anterior one very oblique; 



