MARINE MOLLUSCA OP THE UNITED STATES. 69 



tentacles cylindrical, much swollen at their tips. The species are 

 few in number and small, though exceedingly elegant. 



1. A. POLITA, Yerrill. Fig. 122. 



Am. Journ. Science, 3d series, iii. 282, t. 6, f. 5. 1872. 



Shell white, elongated, regularly tapering, slender, acute. 

 Whorls thirteen or more, convex, rounded, scarcely flattened ; 

 surface smooth, polished, shining, with faint or scarcely distinct 

 striae of growth. Aperture broad oval ; outer lip sharp, slightly 

 effuse ; columella slightly curved, without a fold. 



Length 8, diam. 2 mill. 



Dredged in twenty fathoms. 



Eastport Harbor, M*. 



Genus MENESTHO, Moller. 

 Index Moll. Scand. 1842. 

 1. M. STRIATULA, Couthouy. Fig. 123. 



(Pyramis.) Bost. Journ. Nat. Hist., ii. 101, t. 1, f. 6. 1838. 

 Menestho albula, Moller, Moll. Scand. 1842. 

 Menestho striata, Chenu. Man. Concbyl., i. 229, f. 1311. 



Shell smooth, subulate, imperforate, usually polished. Whorls 

 seven to nine, nearly flat, marked by twelve to fifteen minute 

 regular revolving strise, diminishing in number to the apex ; suture 

 linear and rather deeply impressed. Aperture ovate acute, angular 

 above ; base very slightly effuse ; outer lip sharp, smooth, without 

 any sinus or groove at its junction with the body-whorl; pillar 

 lip arched regularly throughout. Pale bluish-white, milk-white 

 within. 



Length 15, diam. 5 mill. 



New England. 



Genus ET7LIMA, Risso. 

 Hist. Nat. Eur. Merid., iv. 123. 1826. 



The Eulimse crawl with the foot greatly in advance of the head, 

 which is usually concealed beneath the margin of the shell ; many 

 of them have distorted shells, the upper whorls being often curved 

 or inclined to one side. 



1. E. OLEACEA, Kurtz and Stiinpson. Fig. 124. 

 Proc. Bost. Soc. Nat. Hist., iv. 115. 1851. 



Shel e-mail, subulate, solid, very shining, white, marked with 

 light-brown transverse bands ; whorls twelve, flattened, closely 

 coiled ; suture inconspicuous ; aperture small, ovate. 



Length 6.25, diam. 1.5 mill. 



