EAST COAST MARINE SHELLS 



89 



slender, curved." Length 7.9 mm. 



A very variable form and the most 

 abundant Turbonilla on our Atlantic coast. 

 The yellow color and the shape are the 

 most constant characters. Range 4-10 

 fathoms. 



PI. 34, Fig. 1S3 



Salem to Wood's Hole, Massachusetts, 



Branford, Connecticut; off Penfield 



Reef, Long Island Sound 



TDRBONILLA DALLI Bush. A large, stout, 

 bluish white, transparent shell with dull 

 lustre; suture deep; whorls very convex; 

 nucleus of two projecting whorls, followed 

 by twelve usual whorls; ribs about sixteen 

 to each whorl, often opaque, very strong, 

 a little oblique; wide spaces between ribs, 

 concave, with squarish ends often just 

 above suture; base short, smooth; outer lip 

 thin, turning to meet the straight, thick- 

 ened, not reflected axial lip; surface en- 

 tirely covered with fine microscopic striae. 

 Length 8.4, diameter 2.2 mm. 



A rather frequent beach shell on 

 the bars of Lake Worth Inlet Palm Beach, 

 Florida. 



PI. 33, Fig. 20 



Off Cape Hatteras, North Carolina; 



Palm Beach, Florida; Sarasota Bay, 



Florida 



TURBONILLA BELOTHECA Dall. Shell white, 

 shining; whorls thirteen or more, gradually 

 Increasing in size, only slightly rounded, 

 suture well impressed; broad prominent ob- 

 lique ribs extending on upper whorls from 

 suture to suture, closer together and more 

 numerous on body whorl; growth lines appar- 

 ent on base, columellar pillar almost 

 straight. Length 11 mm, 



PI. 34, Fig. 4 



Palm Beach; Florida Keys; West 



Florida; West Indies 



TURBONILLA VINEAE Bartsch. Shell wax yel- 

 low, nuclear whorls very small, two in num- 

 ber; axial ribs broad and low, about twen- 

 ty-two upon each whorl; intercostal spaces 

 as wide as ribs, between sutures marked by 

 fine growth lines and seven to eight deep- 

 ly cut spiral lines of pits; aperture large, 

 outer lip thin, showing external sculpture 

 inside. Length 6.3 mm.; diameter 2.9 mm. 

 PI. 34, Fig. 11 



Wood's Hole, Massachuse its to Bran- 

 ford, Connecticut 



TURBONILLA MIGHELSI Bartsch (T. costulata 

 Verrill) . Whorls with eighteen to twenty- 

 six strong axial ribs, spiral sculpture of 

 coarse line of pits at periphery and twenty 

 fine incised lines; the spiral markings 

 passing up sides of ribs but not crossing 

 them. Periphery of last whorl rounded; 

 ten feeble wavy lines on base. Length 3.8 

 mm. 



PI. 34, Fig. 20 



Wood's Hole, Massachusetts 



TURBONILLA ELEGANTULA Verrill. Range 2-10 

 fathoms. 



PI. VI, Fig. 6 



Vineyard Sound to off New Haven, 



Connecticut 



GENUS COUTHOUYELLA 



TURBONILLA STRIATULA Couthouy. "Shell 

 strong, milk white; nucleus of about one 

 and one fourth smooth dextral turns, faint 

 incremental lines covering entire surface 

 of shell; low spiral cords upon early 

 whorls which later become weak; sutures 

 well impressed; base with eight spiral 

 cords; outer lip thick inside, curving to 

 sharp edge; columella curved." Length 

 13.6 mn. 



Practically all the adults lose the 

 early whorls. 



PI. 34, Fig. 9 



Nova Scotia to Buzzard's Bay 



SUBGENUS PARTHENIA Lowe 1840 



TURBONILLA CEDROSA Dall. Length 5.5 mm. 

 PI. 68, Fig. 4 

 Cedar Keys, Florida 



GENUS PERISTICHIA Dall 1889 



PERISTICHIA TORETA Dall. Shell slender, 

 yellowish white, whorls thirteen; nucleus 

 minute, glassy, set on edge, with but two 

 whorls; suture distinct, with plain or wav- 

 ing thread behind it; behind this a strong 

 nodulated spiral, then an Interval and two 

 more spirals close to each other and su- 

 ture behind them; about thirty-four nodules 

 on circuit of last whorl; base with one 

 strong cord and a deep sulcus outside it; 

 pillar of columella straight, three strong 

 internal lirae on outer edge; outer lip 

 swollen, varicose; callus joining pillar 

 and outer lips distinct and continuous. 

 Length 11 mm. 



