LEPTOPOMA.—Prare I. 
Cyclostoma elatum, Pfeiffer, Pro. Zool. Soc. 1852, p. 159. 
Leptopoma elatum, Pfeiffer. 
Hab. Ceylon. 
Dr. Pfeiffer has overlooked the faint closely-waved 
painting of this species, which in his type is almost 
abraded. 
Species 4. (Fig. a, 6, Mus. Cuming.) 
LEPropoMa ACUTIMARGINATUM. Lept. testa modice wm- 
Hab. Island of Luzon, Philippines; Cuming. 
bilicatd, depresso-turbinatd, tenuiculd, olivaceo-fusco | 
et albo marmorataé et taniatd; anfractibus jucta su- 
turas planulatis, deinde convewis, spiraliter obscuré 
filosis, anfractu ultimo ad peripheriam acute carinato ; 
apertura subampla, fere circulari, labro expanso-re- 
leno. 
THE SHARP-EDGED LEPTOPOMA. 
Shell moderately um- | 
bilicated, depressly turbinated, rather thin, marbled | 
and filleted with olive-brown and white; whorls | 
rather flattened next the sutures, then convex, spirally | 
obscurely threaded, last whorl sharply keeled at the | 
periphery; aperture rather large, nearly circular, lip 
expandedly reflected. 
Cuclostoma acutimarginatum, Sowerby, Pro. Zool. Soc. 
1842, p. 80. 
Leptopoma aeutimarginatum, Pfeiffer. 
Hab. Catbalonga, Isle of Samar, Philippines; Cuming. 
This very elegant species is well characterized by its 
central, neatly filleted, sharp-edged keel passing into the 
suture. 
Species 5. (Fig. a, 6, Mus. Cuming.) 
LEePTOFOMA FIBULA. 
Trochiformi, albidd, olivaceo-fusco oblique reticulato- 
Lept. testa peranguste umbilicatd, 
fulgurata ; anfractibus convexo-declivibus, corrugato- | 
malleatis, ultimo obtuse angulato, ad basin filoso-lirato; 
apertura diagonali-ovata, labro tenué expanso. 
Tur BuTron Leproroma. 
Shell very narrowly umbili- | 
cated, Trochus-shaped, whitish, obliquely reticulately 
streaked with olive-brown; whorls convexly sloping, 
corrugately malleated, last whorl obtusely angled, 
thread-ridged at the base; aperture diagonally ovate, 
hp thinly expanded. 
Cyclostoma fibula, Sowerby, Pro. Zool. Soc. 1843, p. 62. 
Leptopoma fibula, Pfeiffer. 
This species, it will be observed, is not keeled, the pe- 
riphery of the last whorl having a rounded diagonally 
inclined form. 
Species 6. (Fig. a, 6, Mus. Cuming.) 
LEPTOPOMA ATRICAPILLUM. Lept. tesl@ peranguste um- 
bilicatd, subpyramidali-turbinata, albidd, castaneo un- 
dique vivide oblique strigatd, apice nigro; anfractibus 
juata suturas plano-declivibus, deinde rotundatis, spi- 
raliter nitidé filoso-liratis; apertura subcirculari, 
lubro expanso-reflexo. 
THE BLACK-TIPPED Leprovoma. Shell very narrowly um- 
bilicated, somewhat pyramidally turbinated, whitish, 
vividly obliquely streaked throughout with chestnut, 
apex black; whorls flatly sloping next the sutures, 
then rounded, spirally neatly thread-ridged ; aperture 
nearly circular, lip expandedly reflected. 
Cyclostoma atricapillum, Sowerby, Pro. Zool. Soe. 1843, 
p. 64. 
Leptopoma atricapillum, Pfeiffer. 
Hab. Calapan, Island of Mindoro, Philippines; Cuming. 
Of a characteristic subpyramidal form, closely streaked 
throughout with bright transparent chestnut, especially at 
the base. 
Species 7. (Mus. Benson.) 
LrpropoMa CYBEUS. 
presso-turbinatd, albidd, castaneo teniatd et sparsim 
Lept. testa angusté umbilicatd, de- 
undato-strigatd ; anfractibus spiraliter filoso-liratis, 
declivi-conveuis, ullimo ad peripheriam acute carinato ; 
apertura subcirculari, labro expanso-reflexo. 
Tun suip Lepropoma. Shell narrowly umbilicated, 
depressly turbinated, whitish, filleted and sparsely 
wave-streaked with chestnut ; whorls spirally thread- 
ridged, slopingly convex, last whorl sharply keeled 
at the periphery; aperture nearly circular, lp ex- 
pandedly reflected. 
Benson, Ann. and Mag. Nat. Hist. 1857, vol. 19. p. 205. 
Hab. Nanclai, Khasia Hills, India; Theobald. 
This very interesting Indian species partakes of the 
form of the large Philippine Z. acutimarginatum. 
