1310 JOURNAL OF THE NEW JERSEY 



back covered by longitadinal folds. Brownish sea-green, with 

 several whitish lines and spots. L. 6 ; W. 2, when folded. — 



Mass. 



2. LiMAPONTIA, Joht. 



Animal minute, leach-like ; head truncated in front, with eyes- 

 on arched, lateral ridges ; foot linear. 



1. Liniapontia zonata, Gir. Body depressed, without the lateral, 

 wing-like expansions, thus its appearance is like that of the land 

 slugs ; mantle distinct ; head somewhat separated from the body^ 

 and with crest-like ridges on the sides ; eyes large, sessile, on the 

 back of the head, in pale, circular spaces. Pale reddish color^ 

 with transverse bands of white. Minute, hardly 2 long. — Mass. 



Order PULMONATA. 



This division includes all the land and fresh water mollusks- 

 which breathe air. The few species included in this work live on 

 the mud flats near shore, sometimes below high water mark, and 

 so, in a sense, may be considered marine. The breathing organ^ 

 in the form of an air sack, or dorsal cavity lined with a vascular 

 network, is placed in front of the heart. All belong to the sub- 

 order Basommatophora which have eyes at the bases of the two 

 flattened, triangular or subcylindrical, contractile but not in- 

 vertible tentacles ; no operculum. 



Family 48. AURICULID/E. 



Shell spiral, solid, usually thick ; spire elevated ; aperture 

 usually elongated, contracted by teeth. Animal with the foot 

 elongated, pointed ; sessile eyes at the inner bases of the ten- 

 tacles ; head extended beyond the tentacles with more or less 

 of a rounded, two lobed snout ; hermaphrodite. 



* Shell over 6 long ; inhabiting the seashore between tides. (A). 



A. Aperture about h the length of the shell /. Alexia. 



A. Aperture more than -^ the length 2. Melampus. 



1. Alexia, Gray. 



Shell oblong-oval, thin ; spire acuminate ; last whorl large, 

 rounded at base; columella with an oblique plait; aperture con- 

 tracted by teeth. 



1. Alexia myosotis, Drap. Elongated ovate, thin, smooth, shin- 

 ing, with acute apex ; whorls slightly convex ; the last f of the 

 whole length ; aperture long and narrow, acute above ; lip thin 



