214 MOLLUSCA. 
Var. lineolatus : minor“flavescens, longitudine aperture diametrum totius teste non superante. 
Bulimus lineolatus, Conrad, Proc. Acad. Phil. vii. p. 82 (1855) *; Pfr. Monogr. Helic. Vivent. iv. 
p. 398%. 
Hab. Centra Costa Rica: San José (Pittier and Biolley); La Uruca, near San José, 
at an elevation of 1100 metres above the sea (Biolley); San Francisco de los Rios, 
also near San José, on hedges which surround the plantations of coffee (Puttier) ; 
Volcan de Cartago 1? 18, 
Costa Rica, without nearer indication of locality (van Patten, in mus. Berol.). 
The stripes of this species are very irregular, even in the same specimen some are 
near one another and others have large intervals between them; often they are more 
greyish-violet than brown, from being situated in a more internal layer of the shell and 
covered by a thin whitish superficial coating. Ordinarily, the stripes break up at the 
same height at some distance from the umbilicus; in young specimens, as a general 
rule, they break up at the angularity in the middle of the whorl. The specimens from 
Costa Rica have generally a thinner and more yellow-coloured shell, and the largest which 
IT have seen from that country is only 20 millim. long, perhaps not quite full-grown. 
O. roseatus, Reeve, from Colombia, comes very near this species. 
19. Otostomus lirinus. 
Bulimus lirinus, Morelet, Test. Noviss. ii. p. 11 (1851)'; Pfr. Monogr. Helic. Vivent. iii. p. 313°; 
Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 494, t. 20. fig. 10°. 
Hab. N. Guaremaua : San Luis de Peten (Morelet }-°), 
20. Otostomus cucullus. 
Bulimus cucullus, Morelet, Test. Noviss. i. p. 9 (1849) !; Pfr. Monogr. Helic. Vivent. iii. p. 383°; 
in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Bulimus, p. 217, t. 60. figg. 11, 12°. 
Bulimus (Leptomerus) cucullus, Pfr. in Malak. Blatt. ii. p. 159 (1855) ‘. 
Bulimulus (Mormus) cucullus, v. Mart. in Albers’s Die Helic. ed. 2, p- 216°. 
Bulimulus (Scutalus) cucullus, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 519, t. 20. fig. 11°. 
h: gracilior. 
Bulimulus (Scutalus) cucullus, var. gracilior, Fisch, & Crosse, loc. cit. p. 519, t. 20. fig. 127. 
Hab. Yucatan : Sisal, on sandy ground (Morelet 1-367), 
Fischer and Crosse® rightly remark that this species, although at first sight 
resembling the genus Succinea, belongs really to Bulimulus. I think its nearest 
affinity is with O. jonasi and O. hegewischi, on account of the similar sculpture of the 
shell. ‘The variety is much more slender; it seems to have been found in company 
with the typical form, and may be only an extreme individual variation. 
21. Otostomus fenestrellus. 
? Bulimus hegewischi, var. 8, Pfr. Symb. Hist. Helic. ii. p. 46°; Monogr. Helic. Vivent. ii. 
p. 173’. 
