22 CATALOGUE OF PHANEROPNEUMONA. 
37. CycLOTUS MUCRONATUS. B. M. 
Shell orbicular, rather thin, a little roughly striate, pale brownish ; 
spire very short, mucronate; whorls 43, rapidly increasing, 
convex, the last one a little deflected and nearly disjoined 
anteriorly; umbilicus broad, open; aperture oblique, circular, 
brownish-white inside; peristome continued, double; inner 
edge short, straight ; outer edge somewhat expanded, sinuate 
above, spirally striate inside. Operc. typical. Height 7, 
greatest breadth 15, least br. 13 mill. 
Cyclostoma mucronatum, Sow. in Proc. Z. S. 1843, p. 63; Thes. n. 
66, p. 113, t. 25, f. 91; Pfr. Tc. n. 52, p. 58, t. 7, £. 11-13. 
Aperostoma mucronatum, Pfr. in Z. f. Mf. 1847, p. 104. 
Cyclotus mucronatus, Gray, Cat. Cycl. p. 8, nu. 12; Pfr. Consp. n. 
38; Pneum. Mon. p. 37. 
Hab. Calanang, island of Luzon (H. Cuming), 
38. CYcLOTUS SUBSTRIATUS. B. M. 
Shell orbicular, slightly mucronate, rather solid, brownish, dis- 
tinctly radiating striate near the suture; spire flattened, raised 
in the middle into a small point; whorls 4$, convex, the last 
one a little deflected anteriorly; umbilicus broad, open; aper- 
ture oblique, circular, fulvous inside; peristome somewhat dupli- 
cate; inner edge affixed; outer edge a little thickened and 
shortly expanded, concentrically striate, with an indistinct 
external angle near the penult whorl. Opere. typical. Height 
64, greatest breadth 14, least br. 11 mill. 
Cyclostoma subsiriatum, Sow. in Proc. Z. S. 1843, p. 61; Thes. n. 
G7, p. 113, t 25,2. 955 (Pfr. Jes n. 5), p. 54, tf, & 16-20 
Aperostoma substriatum, Pfr. in Z. f. MZ. 1847, p. 104. 
Cyclotus substriatus, Gray, Cat. Cycl. p. 9, n. 16; Pfr. Consp. 
n. 39; Pneuwm. Mon. p. 37. 
Hab. The Philippine Island, Siquijor (H. Cuming). 
39. CycLOTUS CORNICULUM. 
Shell small, depressed conic, broadly umbilicate beneath, thin, 
pale, yellowish, transversely painted with brown angular lines; 
whorls 44, cylindrical, rapidly increasing, the last one equalling 
1 of the whole diameter; spire a little prominent; suture simple, 
deep ; aperture somewhat disjoined, circular ; peristome dupli- 
cate; outer edge rather expanded. Opere. typical. Height 6, 
greatest breadth 9.5; least br. 8 mill. (Jf) 
Cyclostoma corniculum, Mouss. jav. Moll. p. 51, t. 5, f. 11. 
Cyclotus corniculum, Pfr. Consp. n. 40; Pnewm. Mon. p. 38. 
Hab. Pardana, Fava (Zollinger). 
