HELIX. 14] 
Helix (Fruticicola) griseola (Pfr.), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 259”. 
Hygromia griseola (Pfr.), Tryon, Am. Journ. Conch. ii. p. 809, t. 22 (5). fig. 5°. 
Dorcasia griseola (Pfr.), Binney, Terr. air-breath. Moll. N. Am. v. (Bull. Mus. Comp. Zodl. Harv. 
Coll. iv.) pp. 347, 348, fig. 231 (jaw), and t. 7. fig. V (radula) *; Manual of Am. Land- 
Shells (Bull. U. S. Nat. Mus. no. 28), pp. 392, 394, figg. 427 (jaw), 429. 
Praticola griseola (Pfr.), Strebel, Beitr. Mex. Land- und Sitissw.-Conch. iv. p. 41, t. 2. fig. 8™. 
Helicogona (Arionta) griseola (Pfr.), Moérch, in Malak. Blatt. vi. p. 111 (1859) **. 
Helix albocincta, Binney, Terr. air-breath. Moll. N. Am. i. pp. 109, 128 (1851) * (nec Pfr. 1845). 
Heliz albozonata, Binney, loc. cit. i. t. 49. fig. 2°”. 
Heliz albolineata, A. Gould, in Binney’s Terr. air-breath. Moll. N. Am. iii. p. 34 (same figure) 
(1857) ®. 
Hab. Nortu America: Indianola and Bosque County, Texas 28 30-33, 
N.E. Mexico: State of Tamaulipas (Couch °°). 
E. Mexico: Environs of Vera Cruz, frequent (Hegewisch 22-24 30, Sallé3°, Uhde and 
Friedel *° °°, Dolfus-Ausset*°, Strebel 3+, Hoge); Cordova, remarkably small 
specimens, only 84-10 millim. in diam. (Hége). 
N. Guatemata: Lake of Flores, Peten (A. Morelet *°). 
W. Nicaragua: on the Volcan de Masaya (Orsted *°, Sallé®°), 
CentRAL NIcaRaGuaA: common throughout the savana-region—Masapa, Granada, 
San Ubaldo, &c., living on the blades of grass and resembling in this habit 
H. virgata (Tate *°). | 
The examination of a considerable number of specimens collected at Vera Cruz by 
Hége shows that H. berlandieriana and H. griseola are connected by many intermediate 
forms, and that, as I have already suggested in 1865 °°, they cannot be maintained as 
distinct. The typical H. berlandieriana (fig. 12) is a more solid shell, globose, with 
conical spire, white, with brown band, the margins of the aperture rather thick. 
Moricand ! gives to it a diameter of 8 and a height of 7 millim., which does not agree 
with his figure, this being evidently broader than high. Pfeiffer!® gives to H. 
pachyloma a diameter of 12 and a height of 9 millim, The largest specimen which 
I have before me, from Texas, measures even 13 millim. in diameter and 94 in height ; 
another, comparatively more elevated, also from Texas, 12 millim. in diameter and 10 
in height. The smallest specimen (fig. 14), agreeing in form and marking with 
H. berlandieriana, from Vera Cruz, measures 9 millim. in diameter and 7 in height. 
The typical H. griseola (fig. 15) has a thin shell and a thin peristome; the spire is 
more depressed ; the dimensions are 10 millim. in diameter and only 6 in height; the 
colour is described as grey, with some white bands, but on comparing the specimens 
themselves it is evident that this coloration is only the result of the extension of the 
pale greyish-brown bands at the expense of the white ground-colour. There are other 
specimens in which the white is not so much reduced (fig. 16); and some which have 
the upper face quite white, as in LH. berlandiertana, but the lower face banded as in 
