114 NEW-YORK FAUNA — MOLLUSCA. 



GENUS PYRAMIS. Brown. 



Shell small, elongated, of numerous whorls. Aperture short, ovate, entire in front ; lip 

 sharp, disunited above ; pillar without a fold 



Pyramis striatula. 



PLATE Vm. FIG. 169. 



Pyramis striatula. CouTHOUv, Bost. Joum. Nat, Sciences, Vol. 2, p. 101, pi. 1, fig. 6. 

 /*. iU. Gould, Invertebrata of Mass, p. 269, fig. 174. 



Description. Shell small, smooth, subulate, imperforate, usually polished. Whorls sever, 

 to nine, nearly flat, marked by twelve to fifteen minute regular revolving stria^, diminishing 

 in number to the apex : suture liaear, and rather deeply impressed. Aperture ovate-acute, 

 angular above ; base very slightly eff'use : outer lip sharp, smooth, without any sinus or groove 

 at its junction wiih the body-whorl ; pillar-lip arched regularly throughout. 



Color. Pale bluish white ; within milk-white. 



Length, 0-6. Basal diameter, 0-2. 



Stomachs of lishes, off the coast of Massachusetts. 



GENUS ODOSTOMIA. Fleming. 



Shell conical, elongated ; aperture ovate ; lips disunited above, and sometimes produced 

 beneath. Pillar with a tooth-like fold. Opercle horny, subspiral. 



Odostomia trifida. 



PLATE VIII. FIG. 170. 



(STATE COLLECTION.) 



ActcBOn trifidiis. ToTTEN, American Jouriml of Science, Vol. 2G, p. 3G9. 

 Odostomia trifida. Gould, Inverlcbrala of Mass, p. 274, fig. 179. 



Descrijytiofi. Shell small, elevated, pointed, smooth and glossy. Whorls eight, flat, with about 

 six impressed revolving lines ; the one above, and the two next below the suture, wider and 

 more distinct : ten or twelve very minute lines at the base of the body-whorl. Spire gradually 

 tapering to an acute apex. Aperture elongate, about one-third the length of the shell, acutely 

 angular above, produced and rounded below. Outer lip sharp and thin, entire ; pillar-lip with 

 a single sharp oblique fold : opercle horny. 



Color. Ivory and soiled white. 



Length, 0-2. Width, 0-08, 



