192 Marine Shells of the Western Coast of Florida 



Family SCArHANDKIDAEssT 



Distribution of the species of this family is through a wide 

 geographic and bathymetric range. They are small and medium-sized 

 mollusks with shells of variable forms. 



Genus t'YLlCHNA Loven, 1S47 

 Subgenus CTLICHNELLA Gabb, 1872 

 Cylichiia I)irteiit4ita«-^s (d'Orbigny) PI. 39, fig. 279 



Alt., 2.6; diam., 1.4 mm. Shell minute, cylindrical, smooth, 

 white, shining; spire depressed, concealed; body whorl narrowed 

 above and below; aperture narrow, widened and produced below, 

 outer lip sharp, arched forward; columella short, one oblique fold 

 at base, a nodular thickening below. 

 Near low water mark. 



Family UlILLIDAE 



This family is represented by species native to all warm seas 

 and adapted to a considerable range in depth. The animals are 

 carnivorous and some members of the group are said to ingest 

 their prey alive and whole. 



The shells are of small to medium size, oblong-cylindrical, spire 

 involute, apex perforate; aperture longer than body whorl, much 

 expanded at base; outer lip thin, sharp; columella arcuate, with 

 produced white callus; no plications. 



Genus BULLA Linne, 1758 

 Bulla occldentalis ■■■» A. Adams PI. 39, fig. 280 



Alt., 20-25 mm. Shell smooth, with microscopic striations; ob- 

 long-cylindrical; apex deeply perforate; variable in size, thickness; 

 mottled and obscurely banded with brown on light background, 

 thin, delicate epidermis; aperture narrowed near periphery of body 

 whorl, produced and expanded below. 



Sandy stations in shallow water. 



3^^ Gr., scapha, boat, boat-shaped. 



^^^ Gr., kylix, a drinking cup; Lat., bidentatus, with two teeth. 



^^^ Lat., bulla, bubble; occ'uirntalis, of the west. 



