MARINE MOLLUSC A OF THE UNITED STATES. 105 



spread out into a thin enamel upon the body of the shell, partially 

 covering an umbilical indentation ; greenish-white. 

 Length 2.5 mill. 



New England, northwards. (Eur.) 



Genus SCAPHANDER, Montfort. 

 Conch. Syst., ii. 335. 1810. 



Animal not investing the shell; eyes none; foot ample, but 

 short, the side lobes small. 



1. S. PUNCTO-STIATUS, Mighels and Adams. Fig. 216. 



(Bulla.) Proc. Bost. Soc. Nat. Hist., i. 49. 1841. 

 S. librarius, Lov6n, Ind. Moll. Scand. 1846. 



Shell white, rather solid, ovate, with crowded inequidistant 

 punctate striae ; spire concealed ; aperture very large, labrum 

 rising above the apex, very sharp and regularly arcuate ; labium 

 with a very thin lamina extending to the apex. 



Length 10, diam. 6 mill. 



Casco Bay, Me. (Eur.) 



Mr. A. E. Yerrill has recently obtained specimens in deep water 

 off St. George's Bank, measuring over an inch in length. 



Genus PHILINE, Ascanias. 

 Act. Holm. 1772. 



Animal investing the shell ; eyes none ; foot not produced pos- 

 teriorly, the side lobes large and fleshy; shell concealed in the 

 mantle. % 



The animals composing this genus are blind, like most creatures 

 that seek their food by burrowing. They frequent mud-flats and 

 slimy banks at the entrances of rivers, which they perforate near 

 the surface, and probe with their flattened heads for the small 

 bivalves which constitute their prey ; these they seize and swallow 

 entire, breaking their shells by means of their testaceous, muscu- 

 lar gizzards. There are about twenty species ; distribution uni- 

 versal. 



1. P. SINUATA, Stimpson. Fig. 21 f. 



Proc. Bost. Soc. Nat. Hist., iii. 333. 1850. 



Shell minute, ovate, white, pellucid, longitudinally striate ; 

 spire conspicuous ; aperture anteriorly dilated . 



Length 1.T5, diam. 1.25 mill. 



The animal is yellowish, elongated ; darkest behind, with dots 

 and patches qf white. 



