SUCCINEA. ‘Sal 
1. Succinea luteola. 
Succinea luteola, A. Gould, Proc. Bost. Soc. Nat. Hist. i. p. 87 (June 1848)"; Binney, Terr. air- 
breath. Moll. N. Am. ii. p. 75, t. 67 ¢. fig. 17; iv. p. 41°; v. (Bull. Mus. Comp. Zool. 
Harv. Coll. iv.) p. 419, t. 67 ¢. fig. 1*; Land and Freshw. Shells N. Am. i. p. 261, fig. 466°; 
Man. Am, Land-Shells, p. 442, fig. 486°; Pfr. Monogr. Helic. Vivent. iii. p. 167; “Tryon, 
Am. Journ. Conch. ii. p. 239, t. 17. fig. 830°; Fisch. & Crosse, Miss. Scient. Mex., Mollusca, 
i. p. 658, t. 27, fige. 2, 2a, 6°; Pilsbry, Proc. Acad. Phil. 1891, p- 318”. 
Succinea texasiana, Pfr. Monogr. Helic. Vivent. ii. p. 526 (Aug. 1848) *'; in Ferd. Roémer’s Texas, 
p- 456 (1849) *; in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Daudebardia, Simpulopsis, 
Vitrina, and Succinea, p. 42, t. 4. figg. 21, 22”. 
General form more oblong, with comparatively long spire (aperture occupying only 4-2 of the whole length) 
and rather narrow aperture, scarcely enlarged towards the base; shell rather thick. Outside whitish or 
very pale yellow, often with greyish rays, especially in the upper whoris; inside often distinctly yellow, 
in dead shells white. 
Long. 13, diam. 74; apert. long. 9, lat. 53 millim. (specimen from Venta de Zopilote). 
Hab. Norta America: Galveston, Texas 1!~13; Florida 1-8, 
N.E. Mexico: State of Tamaulipas (Lieut. Couch °). 
S.W. Mexico: Venta de Zopilote in Guerrero (H. H. Smith). 
Yucatan: Progreso (Heilprin?°). | 
The specimen from Venta de Zopilote, from which the above description and 
measurements are taken, agrees in all essential points with examples from Texas 
and Florida. 
_  Obs.—P. Strobel, Materiali per una Malacostatica dell’ Argentinia meridionale 
[Biblioteca Malacologica, iv. p. 30 (1874)], has recorded S. luteola, A. Gould, from 
Bahia Blanca, in South America, about 38° S. lat.; but as he had only one bleached 
specimen from thence, and mentions some differences between it and Pfeiffer’s figure, 
the identification appears to be very uncertain. 
Var. subtilis, n. (Tab. XIX. fig. 2.) 
Of smaller size, with very slender spire and deep sutures ; outside glossy white, with conspicuous grey rays ; 
inside white. Aperture occupying 3 of the whole length. 
Long. 102, diam. 53; apert. long. 6, lat. 3 millim. 
_ Hab. Fi. Muxico: Vera Cruz (Hoge). 
Var. rudiuscula *,n, (Tab. XTX. fig. 3.) 
Of somewhat larger size, and more or less distinctly wrinkled on the last whorl ; outside very pale yellowish- 
white; inside white. General form somewhat variable, in some specimens as oblong as in typical 
S. luteola, in others with the last whorl more enlarged towards the base; aperture occupying 3-3 of the 
whole length. 
Long. 15, diam. 9; apert. long. 94, lat. 53 millim. 
14, ” 8; ” 9, ” 5 +) 
” 124, ce 8 5 ” 8, ” 53 ” 
Hab. Centra Mexico: Tehuacan (Hége). 
329 
Specimens with comparatively short spire and broad terminal whorl, of the dimensions 
* Incorrectly written radiuscula on the Plate. 
42* 
