I2f2 JOURNAL OF THE NEW JERSET 



with apical nucleus. Animal has a foot rounded in fiont, angn- 

 lated behind ; head large, with short, small tentacles ; eyes at or 

 near the tips of the tentacles, or wanting ; between the tentacles 

 extends a rather long, cylindrical trunk. 



1. Terebra dislocata, Say. Shell polished, attenuated ; whorls 

 flat, with 15-18 ribs to each, which are dislocated or interrupted 

 above, near the suture, by a revolving groove as deep as the 

 suture ; numerous, minute, impressed, revolving lines also on 

 the whorls. Color chocolate brown, with a pale, revolving band ; 

 ribs white. L. 44; D. 8; An. 17°; Wh. IS; Ap.J— Md. and 

 ^outh. 



Family 50. PLEUROTOMID/E. 



Shell fusiform ; aperture witli a canal at the anterior end and 

 a notch at the posterior end near the suture. Operculum often 

 absent, if present horny and annular. Animal with tentacles 

 wide apart, the eyes fit the outer bases. 



* Shell with operculum /. Bela. 



* Shell without operculum 2. Mangilia. 



1. Bela, Gray. 



Shell oval, fusiform, thin; spire produced; canal short; notch 

 small, near the suture ; columella flattened ; operculum pointed 

 at both ends. 



1. Bela harpularla, Cout. Shell ovate-oblong ; whorls round 

 and shouldered, with about 18 oblique, rounded ribs, crossed by 

 fine revolving lines ; ribs disappearing on the lower part of 

 body whorl ; aperture narrow, outer lip sharp, inner lip white, 

 smooth ; canal very short. Brownish flesh color. L. 16 ; D. 8 ; 

 An. 35° ; Wh. 6-8 ; Ap. f.— N. Y. and north. 

 2. Mangilia, Risso. 



Shell fusiform, mostly longitudinally ribbed ; spire elongated, 

 turriculated, acuminated ; canal short, more or less truncated ; 

 columella smooth ; sinus near the suture. No operculum. 



1. Mangilia jilicosa, C. B. Adams. Shell small, elongated-ovate, 

 somewhat turreted ; lower whorl two thirds the length of the 

 shell, with about 12, somewhat oblique rib-like folds crossed by 

 10 or more elevated revolving threads ; aperture narrow ; outer 

 lip greatly thickened by one of the ribs ; the notch at the pos- 

 terior part deep, distinct, smooth. Ashy-white color. L, 6 ; D. 

 3 ; An. 45° ; Wh. 6 ; Ap. J nearly. — Cape Cod and south. 



