36 CATALOGUE OF PHANEROPNEUMONA. 
The very numerous species, which must be referred to this 
natural genus, may be arranged into the following sections :— 
A. Subturbinate. 
1. Peristome expanded. 
a. Axis umbilicated, open. 
a. Shell not carinated 81. Nee 
B. Shell subcarinated or carinated. 
* Keel one, often obsolete . 2. , 12-25. 
** Keels or spiral ribs more than one : 3. ,, 26-38. 
6. Axis umbilicated, partly covered with 
a tongue-like process 4, , 39-44. 
c. Axis imperforated, or ae covered & 5. 4, 45-46. 
2. Peristome straight : A § 6. ,, 47-59. 
B. Depressed. 
1. Peristome expanded. 
a. Shell spirally ribbed, or striate 7. 5, 60-65. 
6. Shell smooth ‘ : 8. 66. 
2. Peristome straight. 
a. Thickened . : : : ; . § 9..,,. 67-69. 
b. Thin, 
a. Shell spirally striated, or furrowed $10. were 
B. Shell oblique, wrinkled, or foveated . §11. ,, 78-80. 
y. Shell with simple radiating strie . §12. ,, 81-85. 
§ 1. Shell subturbinated, not keeled, peristome expanded, axis um- 
bilicated, open. 
1. CychopHorus HIMALAYANUS. 
Shell globose-turbinate, rather solid, with 10-12 blunt spiral ribs 
and obsolete interposed lines, whitish, with a deciduous peri- 
ostraca of .... colour; spire turbinate, reddish-brown and 
rather pointed above; whorls 5, moderately convex, the last one 
ventricose, scarcely compressed around the umbilicus, which is 
narrow and funnel-shaped ; aperture nearly perpendicular, cir- 
cular ; peristome simple, continuous, shortly affixed, brownish- 
fiery, rather thickened, shortly expanded, somewhat. angulated 
above. Operc? Height 35, greatest breadth 48, least br. 39 
mill. 
Cyclostoma Himalayanum, Pfr. in Proc. Z. S. 1851, p. ; Le. 
n. 228, t. 33, f. 10, 11. 
Cyclophorus Himalayanus, Pfr. Consp. n. 65, p. 50; Pneum. Mon. 
p. 55. 
Hab. India, the Himalayah Mountains. 
2. CYCcLOPHORUS SPECIOSUS. 
Shell depressed-turbinate, solid, with rather undulated, crowded, 
impressed spiral lines, chestnut-coloured and marbled with 
