116 MOLLUSCA. 
4, Hyalinia tehuantepecensis. 
Zonites tehuantepecensis, Crosse & Fischer, in Journ. de Conch. Xvili, p. 297 (1870) *. 
Zonites (Hyalinia) tehuantepecensis, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 174, t. 10. 
figg. 1, la’. 
Helix tehuantepecensis (Cr. & Fisch.), Pfr. Monogr. Helic. Vivent. vil. p. 155 _ 
Hab. S.W. Mexico: Tehuantepec (Sallé+ °). 
6. var. major: diam. 53 millim. 
Hab. N. Guaremata: Senahu in Alta Vera Paz (Champion). 
The white radial stripes are not to be seen in Fischer and Crosse’s figure, but they 
are clearly indicated in the description. 
5. Hyalinia arborea. (Tab. VI. figg. 13, 13 ac.) | 
Helix arborea, Say, in Nicholson’s Encycl. ii., Conchology, t. 4. fig. 4 (1816 *) ; Complete Writings 
on Conch. p. 5, t. 72. fig. 47; Binney, Bost. Journ. Nat. Hist. iii. p. 422, t. 22. fig. 1°; 
Terr. air-breath. Moll. N. Am. ii. p. 235, t. 29. fig. 3*; A. Gould, Invert. of Massach. 
p- 182, fig. 110, & ed. 2, p. 110’; Pfr. Monogr. Helic. Vivent. i. p. 95°, and in Martini & 
Chemnitz, Syst. Conch.-Cab. ed. 2, Heliz, ii. p. 114. no. 533, t. 85. figg. 38-35 "; Whiteaves, 
in Canad. Nat. 1863, p. 24°. 
Hyalina arborea (Say), Albers, Die Helic. p. 66°; v. Mart. in Albers’s Die Helic. ed. 2, p. 69"; 
Binney & Bland, Land and Fresh-water Shells of N. Am. i. p. 33, figg. 38, 39 (jaw), 40 
(radula) *'. 
Zonites arboreus (Say), Binney, Manual of Am. Land-Shells (in Bull. U.S. Nat. Mus. no. 28), 
p. 61, fig. 18”. 
Hyalinia subhyalina, Strebel, Beitr. Mex. Land- und Siissw.-Conch, iv. p. 18, t. 4, fig. 14° (nec 
Pfr.). 
Hab. Norta America®~7: from Great Slave Lake ! 12, 62° N. Lat., Labrador }! 12, and 
Lower Canada, where it is one of the commonest land-snails °, to Florida}! ¥°, 
Texas 11 12, New Mexico !! 1, and California 1! 12, 
KE. Mexico: Las Vigas (Hége) ; either Vera Cruz or Mirador near Jalapa (Strebel 1°). 
N. Guatemata: San Luis, Peten (coll. Morelet). 
ANTILLES: Cuba®?7; Guadeloupe !! 2, 
The Mexican and Central American specimens in A. Morelet’s collection are a little 
yellower than the majority of those from North America; but in form, size, and sculp- 
ture I cannot detect any difference. Strebel’s figure and description !° agree very well 
with the specimens from Las Vigas in size (4 millim.), height (2 millim.), number of 
whorls (4), somewhat elevated spire, sculpture, &c. ; but differ considerably in all these 
characters from the original description and figure of Pfeiffer’s H. subhyalina, which is 
“ discoidea, leevigata, albido-hyalina, spira plana; anfr. 34, diam. maj. 24.” 
Our figure is drawn from a Mexican specimen, found at Las Vigas by Herr Hoge. 
The shell appears, at first sight, somewhat less flattened than the figures given by 
