126 THE NAUTILUS. 



shells, even to fresh transparent specimens. Prof. Verrill has lately 

 addeu the following to Dr. Pilsbry's list : 



Blauneria heteroclita Montg., Hyalina Jucida Drap. 



Pceciloronites zonata Verr. (Fig. 17), Siphonaria henica Verr. 



My records add the following: 



Carychium exiguum Say. (var.). Sub-fossil. 



Vitrea cellaria Miill. Several at Hamilton. 



Helix piscina Miill. Several at St. Georges (Fig. 18). 



Planorbis dilatatus Gld. Dev. Swamps, (Brackish water). 



Paludestrina tenuipes Cooper (var.). Eve's Pond. 



The beautiful genus Melampus needs revision, and as I collected 

 (personally) several quarts of these bewildering shells, I will attempt 

 the following key to the Bermudian forms : 



A. Aperture narrow and short, shells small, pointed at both ends, 

 greasy, brownish or blackish, no teeth (see Fig. 4). 



M. bulloides Mont. 



B. Aperture wider and longer, at the extreme base a very promi- 

 nent fold, shells larger, apex pointed, greasy, color brownish 

 or purplish, with one or more revolving white or yellowish 

 bands, row of teeth within the outer lip very numerous, (Fig. 

 5). M. flavus Gmel. 



1. Color plain brown or purple, no stripes, (Fig. 6). 



Var. purpureus n. v. 



2. Size and shape same as purpureus, immaculate white 

 when alive, rare, found only at Hungry Bay, (Fig. 7). 



Var. albus n. v. 



C. Aperture still wider, shell wide at the top, apex abrupt, two or 

 more well developed teeth on the inner lip, often attaining to 

 double the size of flavus, not green, (Fig. 8 is the Florida 

 form). M. cojfeus Linn. 



1. Larger, and apex more pointed than in coff'etis, the row 

 of teeth in outer lip very irregular and uneven, banded 

 spirally, with brown and white, width of bands very irreg- 

 ular, (Fig. 9). Var. yuudlachi, Pfr. 



2. Pilsbry says : " Scarcely if at all to be distinguished from 

 the prior M. gundlachi Pfr., but not attaining so large a 

 size." These are probably the juvenile gundlaclti, the 

 lack of color and lustre in the large ones being due to 

 longer exposure and yet they look like another variety so 

 the smaller ones are called (Fig. 10). Var. redfieldi, Pfr. 



