OTOSTOMUS. 297 
ines colour, but also in the more conical form of its shell, the last whorl being less 
attenuated beneath, more bag-like (saccatus). As the difference is more easily explained 
by a drawing than by description, two figures of this Porto-Rican shell are given 
(Tab. IV. figg. 19, 20). Although neither the figure in Deshayes’s continuation of 
Férussac’s Hist. Nat. Moll. Terr. t. 142s. fig. ll, nor that given by Fischer and 
Grosse * (t. 23. fig. 8), exhibits this difference very clearly, I prefer to restrict the name 
“‘ liliaceus” to the Porto-Rican shell. 
Férussac’s fig. 14 and Fischer and Crosse’s fig. 8 a well represent O. flavidus, Menke, 
from Venezuela : see my essay on the Land and Freshwater Mollusca of Venezuela 
(‘Die Binnenmollusken Venezuela’s’), p. 29 (1873). 
O. virginalis, Pfr., from Venezuela, common near Caracas, also belongs to the same 
group; it is white, and nearly as slender as var. b of sulfureus, with proportionately 
smaller aperture, only two-fifths of the length of the shell. Pfeiffer, ‘ Novitates 
Conchologice,’ iii. p. 422, mentions a variety of it from Chiapas, distinguished by 
the more rounded last whorl and a rounded aperture; I suspect this is a whitish 
specimen of O. sulfureus, var. b. 
The specimens of O. virginalis examined by Strebel, Beitr. Mex. Land- und Siissw.- 
Conch. v. pp. 88, 89, were from Caracas. 
Our var. c, gracilior, is very near 0. flavidus, Menke [see v. Mart. Binnenmoll. Vene- 
zuela’s, p. 29; Férussac, t. 142 B. fig. 14 ; Reeve, Conch. Icon. v., Bulimus, t. 45. fig. 287 
(liliaceus)|; but I have not yet seen a specimen from Mexico or Central America with 
the delicate rosy hue on the lower half of the last whorl which is so characteristic 
of this species. 
38. Otostomus moricandi. 
Bulimus moricandi, Pfr. P. Z. S. 1846, p.113*; Monogr. Helic. Vivent. 11. p. 109°; Reeve, Conch. 
Icon. v., Bulimus, t. 45. fig. 283°. 
Bulimus (Leiostracus) moricandi, Pfr. in Malak. Blitt. ii. p. 153 (1855) *. 
Bulimulus (Liostracus) moricandi, v. Mart. in Albers’s Die Helic. ed. 2, p. 213°. 
Bulimulus (Drymeus) moricandi, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 497, t. 24. 
figg. 9,9a°. 
Hab. N. Guatemaia: Coban (Delattre?); Vera Paz (Morelet °). 
Var. hyalino-albidus. . 
Bulimus moricandi, var., Pfr. Monogr. Helic. Vivent. iv. p. 898 - 
Bulimulus (Drymeus) moricandi, var. B. hyalino-albida, Fisch. & Crosse, loc. cit. p. 498 °. 
Hab. S. Mexico: Chiapas (Ghiesbreght 78). 
Yucatan (Ff. D. Godman, Feb. 1888). 
E. Guatemata: Yzabal (Séo//). 
I have never seen a reliable specimen of O. moricandi. Judging from the description 
and the figures, it resembles in sculpture and coloration O. sulfureus, but differs in the 
29* 
