epidermis with sharp but microscopic projecting lamelliform points, 

 which are frequently worn off; with rather coarse and distant striie of 

 growth ; spire convex, moderately elevated ; apex subacute ; whorls five 

 and one-half, a little convex, with a well impressed suture ; aperture 

 lunate; on the inside of the periphery of the last whorl, a little within 

 the labrum, commences a slightly elevated lamella, which extends from 

 100° to 120° farther in; labrum* very thin and sharp; columella 

 somewhat thickened, very oblique ; columellar region moderately in- 

 dented. 



Greatest breadth .39 inch ; least breadth .35 inch ; height .27 inch. 



Helix graminicola. Shell depressed globular; brown, with a 

 white zone next below the suture, and another on the periphery of 

 the last whorl, which last zone is margined above with a blackish 

 brown zone : with striae of growth which are fine beneath and 

 coarse above ; spire convex, moderately elevated ; apex rather ob- 

 tuse ; whorls more than five, rather convex, with a well impressed 

 suture ; aperture more than a semicircle, much modified by the penult 

 whorl ; labrum rather sharp and thin ; thickened a little within by a 

 purple deposit, slightly reflected over the small umbilicus. 



Helix MacMurrayi. Shell globular ; white, with a very thin 

 brown epidermis ; with very fine strise of growth, and very lightly 

 impressed unequal v«:piral lines ; spire with the outlines quite convex ; 

 apex very obtuse ; whoi-ls nearly six, quite convex, a little concave 

 at the upper part, with a lightly impressed suture ; aperture subor- 

 bicular, a little modified by the intrusion of the last whorl ; labrum 

 not reflected, rather sharp, but in the old shells not thin ; umbilicus 

 wanting. 



Greatest breadth 1.9 inch ; least breadth 1.6 inch; height 1.5 inch. 



Helix mdnda- Shell depressed globular; with a rather thick 

 epidermis, which is horn colored on the upper whorls, and greenish 

 brown on the rest ; with excessively fine striae of growth : spire con- 

 vex, moderately elevated ; apex very obtuse ; whorls fine, moderate- 

 ly convex, with a well impressed suture ; last whorl large, somewhat 

 depressed ; aperture suborbicular, angular at the end of the oblique 

 white columella, and modified considerably by the penult whorl ; lip 

 excessively thin and sharp ; umbilicus wanting. 



This shell resembles the young of the preceding, which when 

 young is much flattened on the spire, has the aperture much larger^ 

 and the columella is straight. 



Greatest breadth .6 inch ; least breadth .5 inch ; height .4 inch. 



