82 Marine Shells of the Western Coast of Florida 



Tellina simlllsi^' Sowerby PI. 43, fig. 305 



Alt., 18; length, 22 mm. Shell more regularly oval than most of 

 the Tellinas. Pale pink or rosy, rayed with a deeper shade; surface 

 sculpture of fine concentric lines of delicate oblique striations; 

 umbos almost central, ligament small; pink within; lateral teeth 

 developed. 



Genus 3IAC0MA Leach, 1819 

 Macoina constrlcta^'^ (Bruguiere) PI. 16, fig. 100 



Alt., 33; length, 50 mm. Shell subequivalve, dull white, sculp- 

 ture of incremental lines, brownish epidermis heaviest near margins; 

 umbos bluntly pointed; ligament long, narrow; anterior and ventral 

 margins rounded; posterior area flexuose, inclined toward right, with 

 a notch in ventral margin anterior to the flexure; feeble cardinal 

 teeth, laterals not developed; long, confluent pallial sinus. 



Macoma teiitai'^^ souleyetiana (Recluz) PI. 44, fig. 307 



Alt., 10.5; length, 18 mm. Shell inequilateral, small and fragile, 

 white or yellowish, slightly iridescent; fine, concentric lines and 

 delicate radial striations visible both within and without under 

 magnification; umbos small, sharp; ligament small; anterior and 

 ventral margins rounded, posterior margin shorter, straighter and 

 flexuose; hinge margin frail, two cardinal teeth in left and one in 

 right valve, one right posterior lateral tooth; pallial sinus confluent, 

 its end two and three-quarters millimeters from anterior muscle 

 scar. 



This is a southern variety of M. tenta (Say). 



Subgenus PSvVMMACOMA Ball, 1900 

 Macoma brevifronsi^s (Say) PI. 16, fig. lOOA 



Alt., 14; length, 25 mm. Shell oval, inequilateral, white to 

 salmon pink or yellowish; smooth definite growth lines; umbos 

 small, anterior to middle, small ligament; anterior margin short 



135 Lat., similts, like. 



1-'^ Lat., constricius, drawn tight. 



i-*" Lat., tentis, stretched out. 



13** Lat., brcvis, short; frons, forehead, front. 



