Epitoniidae and Melanellidae 115 



peristome thick and heavy with a decided flexure at junction of 

 outer Hp with body whorl. 



Found with other Epitoniums. 



Epitoniam mnlti striatum matthewsae-'^'i Clench and Turner 



PI. 22, fig. 147 



Alt., 12 mm. Shell white, glossy, imperforate; apical whorls 

 smooth and translucent; seven or eight convex whorls, in contact; 

 ribs are continuous, over upper three whorls they are close and 

 threadlike, becoming more elevated and more widely separated on 

 succeeding whorls; about 16 ribs on body whorl; the intercostal 

 spaces are clearly engraved with fine, close spiral lines; aperture 

 oval, margin thickened. 



On sandy bottoms in two to six fathoms. 



Epitonium tolUni (Dall) Bartsch PI. 22, fig. 148 



Alt., 10 to 15 mm. Shell white, glossy, elongate, slender; nuclear 

 whorls smooth; eight or nine convex whorls, not contiguous; ribs 

 lamellar, moderately elevated, equidistant, variable in number — from 

 seven to eleven on body whorl; intercostal spaces without spiral 

 sculpture; aperture slightly oval. 



Sandy bottoms, moderate depths. 



Family .VELANELLIDAE 



Members of the family Melanellidae belong, for the most part, 

 to the fauna of tropical and subtropical seas; many species are native 

 to West Indian, Caribbean, and Florida waters. Some Melanellidae 

 are parasitic upon the integument or within the intestinal canal of 

 echinoderms and holothurians, "where they creep about with much 

 vivacity". Other species live in commensalism with sea urchins, and, 

 according to P. Fischer, perhaps nourish themselves on the excre- 

 ments of their companions. 



The cephalic extremity of the mollusk is equipped with a re- 

 tractile trunk, a pair of tentacles, and eyes at the outer base of each 

 tentacle. 



201 Lat., multi, many; striatus, channeled. Subspecies named for Charlotta 

 Matthews, of Sanibel Island. 



