OF CONCHOLOGY. 73 



two cardinal teetli united above; anterior one falcate, with a pit 

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

 ward. 



T. PARILIS. PI. 3, fig. 12. 



Description. — Suborbicular or suboVate, inequilateral, ventri- 

 cose ; umbo prominent ; posterior end acutely rounded ; ventral 

 margin profoundly curved ; surface entire. 



Locality. — II addon field, N. J. 



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

 genus 3Tysia [Diplodonta) that I so referred it in the Journal of 

 // the Acad. Nat. Sci., vol.^/, pi. 46, fig. 16. 



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This genus was originally made a subgenus of Tellina, under 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 Tellinimera. I have shortened this name in the 

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

 Greek origin. 



T. EBOREA, Conrad. Plr*^' fig. y/,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, Avhich has since been obtained in the Iladdon- 



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



A/Tr(mJ teeth, directed obliquely forward, the anterior one very oblique; 

 A 



