190 CATALOGUE OF PHANEROPNEUMONA. 
Cistula? lineolata, Gray, Cat. Cycl. p. 58, n. 5; Pfr. Consp. n. 397 ; 
Mon. p. 270. 
flab. St. Vincent, W. India. 
19. CistunA THOREYANA. 
Shell perforate, turreted, slightly truncate, thin, crowdedly sculp- 
tured with longitudinal plaits, diaphanous, horn-coloured 
whitish, painted with interrupted reddish-brown concentric 
lines; whorls 64, very convex, the last one detached, widely 
angulated above; aperture perpendicular, ovate, peristome 
rather double, continuous, with the right margin shortly ex- 
panded. Operculum typical. Length 14, breadth 64 mill. 
Cyclostoma Thoreyanum, Philippi, in Z. f. M. 1851, p. 31; Pfr. 
Te. n. 351, t. 43, f. 28-30, 
Cistula Thoreyana, Pfr. Consp. n. 398; Pneum. Mon. p. 270. 
Hab. Bolivia. 
§ 6. Shell ovate or oblong-turreted; last whorl detached in front ; 
peristome double; outer edge flat. 
20. CIsTULA? ROSTRATA. 
Shell perforate, ovate-turreted, truncate, thin, horn-coloured 
whitish, painted with longitudinal waving fuscous lines, closely 
sculptured with longitudinal thread-like plaits, several of 
which, at irregular distances, are stronger, and the interstices 
minutely decussated; suture slight, denticulate; whorls re- 
maining 43, somewhat convex, last shortly detached anteriorly ; 
aperture perpendicular, angularly ovate; peristome double; 
inner edge continuous, slightly expanded; outer edge dilated, 
interrupted on the penultimate whorl, otherwise spreading hori- 
zontally, produced above into a recurved beak. Length 18, 
breadth 8? mill. 
Cyclostoma rostratum, Pfr.in Proc. Z. S. 1851; Jc. n. 349, t. 43, 
f, 26, 27. ¥ 
Cistula? rostrata, Pfr. Consp. n. 399, p.72; Pneum. Mon. p. 271. 
Locality unknown. 
21. CistunaA? AMBIGUA. 
Shell ovate-conoidal, obtuse, perforate, thin, pellucid, whitish, 
with interrupted yellow lines arranged in transverse series, with 
prominent longitudinal strie; labrum with the margin re- 
flected, much dilated. Length 7 lines. 
Cyclostoma ambigua, Zam. Hist. vi. p. 145, n. 11; Ad. Désh. viii. 
p- 397. 
