Rae 
THE NATURAL HISTORY SURVEY. 249 
KEY TO SPECIES OF VALLONIA. 
A. Shell with fine, oblique striz. 
L. Lip-refiected, shell ight hor colored.) 6.2 .i0.,.00 = 26. pulchella 
B. Shell coarsely costate. 
1. Color reddish horn, last whorl descending a little in front. ..costata 
2. Color reddish, smaller than 1; last whorl not descending. . .darvudla 
99. Vallonia pulchella Miiller,* pl. xxviii, fig. 26. 
Helix pulchella MULLER, Verm. Hist., Vol. II, p. 30,1774. 
Helix paludosa DACostTA, 1780. 
Helix crystallina DILLWyYN, 1817. 
Felix minuta SAy, Journ. Phil. Acad., p. 128, 1817. 
Flelix pulchella var. levigata MOQUIN-TANDON, 1855, a. o. 
Vallonia pulchella var. enniensis GREDL., Tiroi’s Conchylien, 1856. 
Vallonia pulchella var. persica ROSEN., Nachrichtsbl, D. Mal. Ges., 
p. 128, 1892. 
Vallonia pulchella var. hispanica, STERKI, Proc. Phil. Acad., p. 251, 
1898. 
Shell: Small, depressed conic, rather solid, umbilicated; 
surface shining, marked by numerous fine crowded oblique 
Fig. 77. 
Jaw of VALLONIA PULCHELLA Miiller. (Pilsbry, Guide to Helices, pl. 
79, Fig. 29.) 
striz, which are obsolete on the large, knob-shaped nuclear 
whorl; color light horn, opaque to transparent; periphery 
rounded; sutures deeply impressed or even excavated; whorls 
four, the last two rapidly increasing, rounded, the last whorl 
little, if any, descending at the aperture; spire plano-convex; 
aperture very nearly circular, a little oblique; peristome re- 
flected, white, thickened, the ends approaching; umbilicus 
open, large, spreading, exhibiting all the volutions; base of 
shell convex. 
Greater diam., 2.50; lesser, 2.00; height, 1.25; umbilicus, 0.80 mill. (10125,) 
y- 2.30; Jeera S10) We AEG e 0.80 ‘“ (10125.) 
4 ty 2.60; mM hd eho: i! 0.80 “ (10125.) 
Animal: With a small, short foot, marked on the sides 
and back by several fine longitudinal lines; tail with a mucus 
pore; eye-peduncles long and slender, tentacles short and 
*See Sterki, Observations on Vallonia, Proceed. Phil. Acad., 1893, p. 246. 
