178 A MANUAL OF AMERICAN LAND SHELLS. 



complete anatomy of peUiicida is given by Lehmann (Lebenden 

 Scbnecken, 47, Plate IX, Fig. 12). His count of tbe teetb, 103 rows of 

 37_1_37 teetb, does not agree witb our species as to number of trans- 

 verse rows, but tbat may be far from indicating specific difference. 



Titrina Aiig:elic8B, Beck. 



Shell convexly depressed, smooth, polished, pellucid, greenish-yel- 

 low; spire short, subprominent; suture delicately crenulated ; whorls 



Fig. 171. 3i, rapidly increasing, the last broad below; aperture ob- 

 /;^(Ql5j%^ lique, lunate-oval; peristome 'Simple, subinflected, its colu- 

 ^^iCcl__-y mellar margin not receding and slightly arched. Greatest 

 ^;^aS.'^' diameter 6, lesser 4§'"'° ; height, S'"'". 



Fitrina Angelica', Beck, lud., 1. — Moller, Ind. Moll. Gr., 4 (1842). — Pfeiefer, Mon. 



Hel. Viv., ii, 510.— MoRCii, Nat. Bidr. af Gr., 76.— W. G. Bixxey, T. M. U. 



S., iv, 32, pi. Ixxix, fig. 9; v, 138.— Reeve, Cou. Icon., 4.5. — Tryon, Am. Jouru. 



ii, 243 (1866).— MoRCH, Am. Journ. Conch., iv, 27, pi. iii, figs. 1, 4 (1868).— 



W. G. BiNNEY, L. & Fr.-W. Sh., i, 28 (1869). 

 Helix pellucida, Fabrxcius, Fauna Gr., 389, excl. syn. Muller (1780). 

 Helix domesfica, Strom,* Der Tronh. Vidensk., iii, 435, pi. vi, fig. 15. 



Godhavn, Greenland, on ArcJiangelica officinalis. 



My figure is from a typical specimen in the British Museum. For 

 other figures and much information regarding the species see Morch, 

 I.e. 



Animal bluish-gray, head black ; mantle edge bluish-gray, densely 

 speckled with black ; hinder part of foot pale gray. The lobe of the 

 mantle very small, by which latter character and the smaller number 

 of whorls it is distinguished from pellucida. (Muller in Morch, I. c.) 



I have seen no specimen of the species. 



Vitrina ejcilifsi, Morelet. 



Shell subperforate, rather convex-depressed, very thin, pellucid, hy- 

 aline, very lightly and distantly striate ; suture impressed, margined ; 



* This name I give to a little snail which is represented by Fig. 15, since I find 

 nothing in Linn^'s Systema Nat. to which I can with certainty refer it. It is small, 

 ovate-rounded, and somewhat convex above, and shows 3 small and flat whorls on 

 the one side. The aperture is large and may be called almost entirely round, and the 

 columella, or part attached to the snail's house, comjirises a small segment, or may bo 

 inscribed in an exact circle. The shell is yellowish, and so brittle that one cannot 

 pick it up without breaking it in pieces. It contains a bluish snail. It is found in 

 great numbers under the moss or turf on houses, and is sometimes fully as large as 

 the figure, which represents both the upper and lower sides. (Strom.) 



