72 Marine Shells of the Western Coast of Florida 



centric and radiate striations; hinge typical; interior smooth, 

 salmon-pink; pallia! sinus reflected, wide at base, angular at tip; 

 smooth margins. 



These mollusks live buried in sand just beyond low water mark. 

 They lie obliquely to the surface with the location of the burrow 

 marked by a broad slit in the sand. Gulls and terns dig out and de- 

 vour them in large numbers. 



Macrooallista maculatai"^' (Linne) PI. 13, fig. 82 



Alt., 50; length, 52 mm. Shell smooth, rounded, moderately 

 thick, translucent, inequilateral; fawn color with irregular macula- 

 tions of brown; thin, glossy penostracum; umbos small; lunule 

 small, impressed; interior polished, white, coloration often shows 

 through; pallial sinus long and rounded; margins smooth. Other 

 features typical. 



Genus PITAR Romer, 1857 



Pitarios siinpsoni (Ball) PI. 14, fig. S3 



Alt., 14; length, 14; diam., 8 mm. Shell small, white, rounded, 

 mequilateral, thm periostracum; umbos small, promment; lunule 

 defined, but not the escutcheon; fme concentric striations; interior 

 polished, white or purple; pallial sinus slightly ascending, rounded 

 at extremity; margins smooth. 



Shells of this genus have a groove within the margin of right 

 valve posterior to the hinge and a similar groove in the left valve 

 margin anterior to the hinge. 



Pitar fnlminatai"" (Menke) PI. 14, fig. 84 



PI. 41, fig. 295 



Alt., 14; length, 15 mm. Shell similar to P. simpsoni, though 

 slightly more rostrate. Ground color white with radial zigzag pen- 

 cillings of bright brown, periostracum chalky. 



Sandy bottom from low-water mark to 25 fathoms. 



Genus CYCLINP:LLA Ball, 1902 

 Cjclinellai"^ tenuis (Recluz) PI. 14, fig. 85 



Alt., 24; length, 24.5; diam., 14 mm. Shell white, translucent, 



'"■'' Lat., macula, a spot or stain. 



106 Pitar, a word of African vernacular. 



107 Lat., fulminatus, from fulminare ; to strike with lightning, 

 ^f'^ Cjr., kylos, a circle; rlla, dim. suffix; Lat., tenuis, thin. 



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