UNIVERSALLY DISTRIBUTED SPECIES. 63 



Animal bluish black oa the upper parts; margin and posterior ex- 

 tremity lighter, A distinct caudal mucus pore. 



A variety with an open umbilicus issometimes ^ii^- 1^. 



found (Fig. 17). ^ ^^^^^ 



Jaw somewhat arcuate, long, narrow, ends 



Jaw otZ.indentatus. (Morse.) 



somewnat attenuated, pointed -, concave margin 



smooth, with a slightly developed, broad medium projection. ^'^L 



Lingual membrane very broad, with 53 rows of 79 teeth 

 each (39-1-39); another membrane had 38-1-38, also with 

 3 perfect laterals; centrals tricuspid, the median cusp very 

 large and longer than the base of attachment; laterals 3 

 only on each side, bicuspid, arranged in a straight transverse 

 row; marginals aculeate (Plate III, Fig. G, of Terr. Moll., V). ■^- ^'^^rr!"'"*' 



Genitalia not observed. 



As the description and figures of Eyalina snhrnpicola are not easy of 

 access, I have copied them in the supplement to Terr. Moll. U. S., V. 



Zoiiites iBiinusculus, Binney. 



Shell umbilicated, minute, depressed-convex; epidermis nf^- is. 

 whitish ; whorls 4, convex, not increasing rapidly in diam- 

 eter, with microscopic wrinkles ; suture very distinctly im- 

 pressed; aperture nearly circular; peristome thin, acute; 

 umbilicus large, not spread, deep, and exhibiting the vol u- z.minuserdus. 

 tions ; base rounded, columella with a thin callus. Greater diameter 2^, 

 lesser 2^""™ ; height, 1™™. 



Helix 7ni)u(scula, Binney, Bost. Journ. Nat, Hist., iii, 435, pi. xxii, fig. 4 (1840) ; Terr. 



Moll., ii, 2-21, pi. xvii, fig. 2, excl. syu.— Adams, Vt. Moll., IGl (1842).— 



Chemnitz, 2(1 ed., ii, 112, Tab. Ixxxv, figs. 20-23.— Fpeiffer, Symbol., ii, 33; 



Mou., i, 114.— Reeve, Con. Icon., 731 (1852).— W. G. Binney, Terr. Moll., 



iv, 102.— Morse, Amer. Nat., i, 543, fig. 35 (1867). 

 Helix minulalis, Morelet, nee Fer., Test. Nov., ii, 7. 

 Helix apex, Adams, Coutr. Conch., 36.— Reeve, 1. c. 339. 

 Helix Lavelleana, D'Orbigny,Mo11. Cub. in text, 161, excl. pi. (1853). 

 Helix Mauriniana, D'Orbigny, 1. c. in pi. viii, figs. 20-22, excl. text. 

 rseudohyalina minnscula, Morse, Journ. Portl. Soc, i, 16, fig. 34, pi. vii, fig. 35 (1864).— 



Tryon, Amer. Journ. Conch., ii, 264 (1866). 

 Hyalina minnscula, W. G. Binney, L. & Fr.-W. Sh., i, 37 (1869). 

 Zonites minusculus, Fischer and Crosse, Moll. Mex., 175 (1870).— W. G. Binney, T. 



M., V, 118. 



From the Red Eiver of the Korth to Arkansas, ^i": ^9- 



Texas, and Florida. It may thus be said to inhabit 

 all the Eastern Province; in the Central Province, "^^"^ "^ z.minuscnius. 



