CYCLOPHORID&. 67 
Cyclostoma Bourcierl, Pfr. in Proc. Z. S. 1851; Ic. n. 223, t. 32, 
f. 5-7. 
Cyclophorus Bourcieri, Pfr. Consp.n. 135, p. 55; Pnewm. Mon. p. 95. 
Hab. Republic of Aiquator, Mindo (Mr. Bourcier). 
74. CycLopHoRUS GUAYAQUILENSIS. 
Shell conoidally depressed, solid, very crowdedly striate, and with 
spiral raised lines, yellowish, with narrow chestnut-coloured 
bands ; spire slightly turbinate, with the apex rather blunt ; 
whorls 5, moderately convex, enlarging gradually, the last one 
cylindrical, slightly radiatingly striate in the middle-sized um- 
bilicus ; aperture scarcely oblique, nearly circular ; peristome 
simple, straight, interrupted on the penult whorl. Operculum ? 
Height 8, greatest breadth 15, least br. 12 mill. 
Cyclostoma Guayaquilense, Sowerby, Thes. Suppl. n. 189, p. 163%, 
t.31; B.£319; Pfr. Ic.n. 335, t. 42, f. 21, 22. 
Cyclophorus Guayaquilensis, Pfr. Consp. n. 1386; Pneum. Mon. 
p. 99. 
/Tab. Guayaquil (Mr. De Lattre). 
75. CycLOPHORUS PSILOMITUS. 
Shell depressedly-conoidal, rather solid, greenish yellow, mode- 
rately shining, girdled with very subtle, thread-like, raised, darker 
spiral lines ; spire shortly conoidal, blunt; suture slightly chan- 
nelled ; whorls 4, convex, the last one cylindrical, with the spiral 
lines uniformly continued in the middle-sized deep umbilicus ; 
aperture nearly perpendicular, rather circular, whitish inside; 
peristome simple, sharp, with the margins almost contiguous, 
joined by a short callus. Operc.? Height 8, greatest breadth 
15, least br. 11 mill. 
Cyclostoma psilomitum, Pfr. in Proc. Z. S. 1851; Ic. n. 327, t. 41, 
f, 24, 25. 
Cyclophorus psilomitus, Pfr. Consp. n. 137, p. 56; Pneum. Mon. 
p- 96. 
Hab. Venezuela. 
76. CycLOPHORUS RUFUSCENS. B. M. 
Shell convexly orbicular, thin, diaphanous, brownish-red or 
whitish, girdled with crowded sharply-raised ridges, of which 3-5 
are stronger and nodulous; spire shortly raised, slightly mu- 
cronate ; whorls 5, angularly convex, the last one having a 
more distinct and sharp keel round the middle-sized, open um- 
bilicus; aperture nearly perpendicular, circular; peristome 
simple, sharp, angulated above, shortly affixed to the penult 
whorl. Operculum membranaceous. Height 9, greatest breadth 
15, least br. 13 mill. 
