96 CATALOGUE OF PHANEROPNEUMONA. 
Cyclostoma tortuosum, Sow. Thes. n. 172, p. 152, t. 28, f. 185, 186; 
epee, te, 0. 179, p.N65;%, 24 T19, 20. 
Megalomastoma tortuosum, Pfr. in Z. f. M. 1847, p. 109, n. 3; 
Gray, Cat. Cycl. p. 30, n. 1. 
Cataulus tortuosus, Pfr. Consp. n. 200; Pnewm. Mon. p. 136. 
Hab. The Nicobar Islands. 
2. CaTauLus TEMPLEMANI. 
Shell subperforate, oblong, rather fusiform, solid, striate, slightly 
shining, chestnut-coloured; spire oblong-turreted, with the apex 
rather pointed; whorls 8, moderately convex, the last furnished 
beneath with a sharp prominent keel, deeply striate round the 
umbilicus, which is very narrow; aperture circular, with the 
base slightly produced; peristome continuous, orange-coloured, 
shortly affixed above; right and left margins expanded and 
reflected ; basal margin dilated downward, furnished with a 
canal, which is linear internally, and becomes broader at its 
termination. Length 20, breadth 7$ mill. 
Pupina Templemani, Pfr. in Proc. Z. S. 1851; Jc. t. 31, f. 15, 16. 
Cataulus Templemani, Pfr. Consp. n. 201; Pneum. Mon. p. 136. 
Hab. Ceylon (Templeton). 
3. CatauLus LAYARDI. B. M. 
Shell subperforate, oblong, rather fusiform, solid, sculptured with 
distinct arcuate strize, pale straw-coloured ; spire oblong-turreted, 
with the apex rather pointed; whorls 8, nearly flat, the last 
furnished with a raised and compressed basal keel, radiately 
ribbed round the narrow umbilicus; aperture perpendicular, 
nearly circular, prolongated at its lower part by a rather open 
canal; peristome continuous, white, shortly affixed above, 
double; inner edge prominent; outer edge thickened and re- 
flected, produced at its base, into an angle and grooved by a 
channel, which is narrow internally, broader at the aperture. 
Length 174, breadth 7 mill. 
Megalomastoma Layardii, Gray (Brit. Mus.), Cat. Cycl. p. 31, n. 4. 
Pupina Templemani, Pfr. in Proc. Z. S. 1851. 
Pupina Layardii, Pfr. Jc. t. 31, f. 17, 18. 
Cataulus Layardii, Pfr. Consp. n. 202; Pneum. Mon. p. 137. 
8. Brownish, with the suture obsoletely whitish-denticulate. 
Hab. Ceylon (Mr. Layard). 
4, CATAULUS PYRAMIDATUS. 
Shell subperforate, ovate-pyramidal, solid, marked with distinct, 
crowded, slightly arcuate strie. silk-shining, dark chestnut- 
