DORCASIA. 347 



etc. I will, however, temporarily leave them here. I do not believe they prop- 

 erly belong to Fndicicola. 



I have not examined D. Derlandieriana. The other species, griseola, has a 

 jaw slightly arcuate, high, ends scarcely attenu- 

 ated, blunt ; cutting margin without median pro- _^ ^ * 



jection ; anterior surface entirely covered with 

 numerous, about 12, broad, crowded ribs, denticu- 



lating either margin. . , r^ • > 



o '=' Jaw of D. griseola. 



Lingual membrane (PI. VII. Fig. V) long and 

 narrow. Teeth about 27 — 1 — 27, with 12 perfect laterals. Centrals with the 

 base of attachment long and rather narrow, the outer lower angles but little 

 expanded, the upper margin broadly reflected ; reflection large, with a very 

 stout, long median cusp, bearing a long, stout cutting point extending below 

 the lower edge of the base of attachment ; side cusps obsolete, but side cutting 

 points present, large, triangular, acute. Laterals like the centrals, but asym- 

 metrical by the suppression of the inner, lower lateral angle of the base of 

 attachment and inner side cutting point. Marginals low, wide, the reflec- 

 tion broad, equalling the base of attachment and bearing one inner, broad, 

 long, oblique, bifid cutting point, the inner division the smaller, and two outer, 

 smaller, stout, sharp, side cutting points. 



Dorcasia Berlandieriana, Moricand. 



Vol. in. PI. XLIX. Fig. 1. 



Shell perforated, globose, thin, and translucid, scarcely striated, shining, and 

 with a somewhat silken or opaline lustre, pale yellowish-green, sometimes 

 nearly colorless and generally having a faint, narrow, brownish band around 

 the posterior third of the last whorl ; spire consisting of 5 well-rounded whorls, 

 separated by a deeply impressed suture, the last whorl broadly rounded at the 

 periphery ; contracted at the aperture, which is small, crescentic, with a white, 

 polished, roundly reflexed peristome, presenting a sharp, inner edge to the in- 

 terior ; the peristome is somewhat angular near its posterior junction, and at 

 this part the shell is thickened within with callus, and is opaque white ; base 

 rounded, and perforated by a minute umbilicus. Greater diameter 13, lesser 

 10 mill.; height, 8 mill. 



Helix Berlandieriana^ Moricand, Mem. de S. Phys. et d'Hist. Nat. de Geneve, 

 VI. 537, PI. I. Fig. 1 (1833). — Deshayes in Lam. An. sans Vert., VIII. 133 ; 

 ed. 3, III. 316. — Leiijv, T. M. U. S., I. 255, PI. VIII. Fig. 11 (1851), anat. 

 — BiNNEY, Terr. Moll., II. 109, PI. XLIX. Fig. 1. — W. G. Binney, Terr. 

 Moll., IV. PI. LXXVII. Fig. 22 ; L. & Fr.-W. Sh., I. 159 (1869). — Pfeiffer, 

 Men. Hel. Viv., III. 227 (not I.); in Chemnitz, ed. 2, II, 275, PI. CXXIIL 

 Figs. 15 - 18. — Reeve, Con. Icon., No. 708 (1852). — Fischer and Crosse, 

 Moll. Mex. et Guat, 256 (1870). 



