164 American Seashells 



small umbilicus or none, and the shoulder of the whorls is somewhat flattened. 

 It is not common. 



Epitonmm tollini Bartsch Tollin's Wentletrap 



West Coast of Florida. 



Y2 inch in length, slender, no umbilicus. 9 to 10 whorls strongly convex; 

 suture deep. Each whorl has from 11 to 16 costae which are not shouldered, 

 but are rounded, on top. They often line up one below the other. Outer lip 

 thick and reflected. Inner lip much smaller. Color china-white, with the 

 first few whorls a very faint amber-brown. Fairly common just off the outer 

 beaches. Do not confuse with E. humphrey si whose costae are angular at 

 the top, 



Epitonium humphrey si Kiener Humphrey's Wentletrap 



Plate 2 2d 



Cape Cod, Massachusetts, to Florida and to Texas. 



% to % inch in length, fairly slender, thick-shelled, and without an 

 umbilicus. Color dull-white. Suture deep. The 9 to 10 convex whorls each 

 have about 8 to 9 costae that are somewhat angled at the shoulder. Costae 

 usually thick and strong. Outer and lower part of the apertural lip thickened 

 and slightly flaring. Common from shore to 52 fathoms. Do not confuse 

 with E. angulatum which is not so slender, is glossier, has thinner costae that 

 are usually more angular at the shoulders. 



Epitonium ehurneum Potiez and Michaud listed by Percy Morris (1951, 

 p. 122) does not occur in American waters. His illustrations are probably 

 those of E, commune Linne from Europe. 



Epitonium angulatum Say Angulate Wentletrap 



Plate 22b 

 New York to Florida and to Texas. 



% to I inch in length, moderately stout to somewhat slender, strong and 

 without an umbilicus. 8 whorls with about 9 to 10 strong but thin costae 

 which are very slightly reflected backwards and which are usually angu- 

 lated at the shoulder, especially in the early whorls. The costae are usually 

 formed in line with those on the whorl above and are fused at their points 

 of contact. Outer lip thickened and reflected. Color china-white. One of 

 the commonest Atlantic wentletraps found in shallow water to 25 fathoms. 

 Do not confuse with E. humphrey si. 



Epitonium foliaceicostwm Orbigny Wrinkled-ribbed Wentletrap 



Southeast Florida to the Lesser Antilles. 



