80 Marine Shells of the Western Coast of Florida 



with fine, closely placed, equidistant, concentric threads, continuous 

 over rostrum to the posterior border, with some intercalation of 

 threads at the umbonal ridge; the interspaces are a little wider and 

 somewhat irregular and growth lines more evident near margin. 

 Immediately posterior to umbos the border is slightl}^ concave, the 

 posterior extremity is narrow and bluntly rounded; the ventral border 

 curves gently to the rounded anterior extremity and the anterior 

 border rises in a straight line to the umbos. The external hinge liga- 

 ment is yellow brown. The right valve has two cardinal teeth, an 

 anterior and a strong posterior lateral; the left valve has a bifid 

 anterior with a weak posterior cardinal and feeble anterior and 

 posterior laterals. The interior is polished and tinted in shade of the 

 exterior; the posterior adductor scar is impressed, the pallial sinus 

 confluent with the pallial line almost to the anterior muscular im- 

 pression, the tip distant from it one-half millimeter and the upper 

 border one and a half millimeters below the umbo. 



Tellina iiierai^s Say Text fig. 4 



Alt., 8.75; length, 14 mm. Shell white within and without, 

 rounded-oval, smooth, but not polished; delicate, elevated, concentric 

 striations; umbos sharp, almost central, forming an angle in outline 

 of shell; ligament reddish, not prominent; shell rounded and longer 

 anterior to umbos; posterior end shorter, obtusely angulated with 

 convex ventral margin; two cardinal teeth in each valve and a single 

 prominent lateral tooth in left valve. 



Fig. 4. Tellina mcra Say 

 ^3- Lat., mera, pure. 



