98 MOLLUSCA. 
Hab. Centrat Guatemata: Totonicapam (Bocourt?~). : 
Costa Rica (van Patten, mus. Berol. no. 21859; and Rogers) ; San José (P. Biolley : 
var. major). 
This species has been wrongly identified with S. cylindracea, Pfr., first by its author, 
Morelet himself, Journ. de Conch. iii. p. 40, but with a point of interrogation, and 
afterwards by all subsequent authors; it is, however, sufficiently distinct from it, as 
will be seen by comparing the figures of Morelet’s type (fig. 20) with that of Pfeiffer’s 
S. cylindracea (fig. 18). 
The Costa Rican specimens (figg. 21, 21 @) differ in their dimensions somewhat from 
the typical ones—the one obtained by Rogers being longer (17 long, 8 broad, ap. 114 
millim.), the other by van Patten shorter (21 ea 84 broad, ap. 12 millim.), the breadth 
remaining nearly the same. : 
| 18. Streptostyla thomsoni. 
Streptostyla thomsoni, Ancey, Aun. de Malac. 1886, p. 2577. 
Hab. Honvuras: Utila Island (Simpson 4). 
19. Streptostyla viridula. 
Streptostyla viridula, Angas, P. Z. S. 1879, p. 482, t. 40. te. 12°. 
Hab. §.K. Costa Rica: hills of Uren (Gadd 1). 
An imperfect specimen, which may belong to this species, found by Mr. Carmiol in 
Costa Rica, is in the Berlin Museum. 
20. Streptostyla plicatula. 
Streptostyla plicatula, Strebel, Beitr. Mex. Land- und Siissw.-Conch. iii. p. 16, t. 8. fig. 27. 
Hab. EH. Mexico: Orizaba (Botteri 1). 
21, Streptostyla biconica, (Tab. V. figg. 17, 17a.) 
Spiraxis biconica, Pfr. P. Z.S. 1856, p. 378°; Malak. Blatt. ii. p. 233 (1856) *; Monogr. Helic. 
Vivent. iv. p. 578°. 
Streptostyla biconica (Pfr.), Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 32‘. 
Hab. Cutapas (Ghiesbreght 1~*). 
Figured from a specimen in the collection of the late Mr. Albers, who had it pro- 
bably from Pfeiffer himself. 
_ 22. Streptostyla flavescens. (Tab. V. fig. 19, var.) 
Spiraxis flavescens, Shuttl. in Bern Mittheil. 1852, p. 206 (Diagn. no. 2, p. 26) 1; Notitiz Malac. 
ii, p. 15, t. 5. fig. 7°; Pfr. Monogr. Helic. Vivent. iii. p. 476 *. 
Streptostyla flavescens, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 39 *. 
Hab. K. Mexico: Cordova (Jacot-Guiliarmod !-), 
