84 Marine Shells of the Western Coast of Florida 



selves anew by use of the strong, pointed foot. The two siphons are 

 slender, separate, and about five times the length of the shell. 



The shells are compressed, rounded or slightly oval, with a slight 

 posterior flexure, and a short external ligament, very thin epidermis. 



Genus SEMEL?: Schumacher, 1817 

 Seinele bellastriatai" (Conrad) PI. 16, fig. 102 



Alt., 18; length, 23 mm. Shell inequivalve, longest anteriorly; 

 ground color light, with irregular radiate markings of dull purple, 

 visible also within; umbos small, pointed, approximate; sculpture 

 of strong, close, concentric ridges, cancellated by finer, radiating 

 ribs, strongest toward posterior; two cardinal and two lateral teeth 

 in each valve; interior polished, purple or yellow-tinted. 



Dredged in four to seven fathoms. 



Seniele profioiiai^- (Pulteney) PI. 16, fig. 103 



Alt., 28; length, 30 mm. Shell orbicular, almost equilateral, color 

 creamy pink with indefinite darker markings; umbos small, a small 

 lunule and a small obliquely excavated escutcheon which contains 

 the ligament; fine concentric lines and delicate radial striations; 

 interior of valves smooth, stippled with pink and purple. 

 From three to six fathoms. 



Semele puri>nrascensi*-^ (Gmelin) PI. 16, fig. 104 



Alt., 30; length, 34 mm. Shell subequilateral, greatest length 

 anterior to umbos; margins rounded, umbos small, pointed; ground 

 color cream, with irregular blotched pattern of soft purple, some 

 specimens are deep yellow. The color markings of this shell tend 

 toward a radiate pattern, those of S. projicua tend to be transverse. 

 Clear-cut concentric sculpture which fades toward posterior margin; 

 interior of valves deeply colored purple or yellow, fading at margin 

 where external color and pattern show through. 

 Taken with other Semeles. 



Semele nnciiloidesi^* (Conrad) PI. 16, fig. 105 



Alt., 4.25; length, 6.25 mm. Shell small, white, not thin; in- 



^^^ Semele, mother of Bacchus; helliis, beavitiful ; striatus, striped. 

 ^^'- Lat., proficuus, useful. 

 ^^■' Lat., purpura, purple. 

 ^*'* Lat., nucula, nut. 



