338 LIEUT.-COL. H. H. GODWIN-AUSTEN ON [June 18, 
Lacocuetus, Blanf. 
Although the notch at the sutural margin of the peristome is 
very small and less apparent than in the typical Indian species, yet 
it is there, and in all characters agrees with the genus Lagocheilus 
as described by W. T. Blanford. 
(ven, 11. Lacocuerxus pio, n. sp. (Plate XX XIX. fig. 5.) 
Shell turbinate, rather thin, umbilicated narrowly; sculpture 
covered with a stony epidermis, smooth, with a distinct rib on the 
periphery, extending on to the penultimate whorl; colour amber- 
brown; spire high, sides flat; apex poimted; suture impressed ; 
whorls 6, moderately convex, the last subangulate, and angulate 
below round the umbilicus; aperture circular, subvertical; peri- 
stome double, with a slight sutural notch, the outer lip slightly 
expanded and reflected at right angles. 
Size: maj. diam. 10-0; alt. axis 7°0; diam. apert. 5:5 millim. 
Operculum not preserved in the only two specimens before me. 
Hab. Niah Hills (4. Everett). 
I have named this shell after H.M.S. ‘Dido,’ the officers and 
crew of which, on the first occupation of Sarawak by Rajah Brooke, 
did good service in the suppression of the pirates who then infested 
those waters. 
12. LAGOCHEILUS KEPPELI, nu. sp. (Plate XX XIX. fig. 4.) 
Shell globosely turbinate, rather solid, translucent, closely umbili- 
cated ; sculpture a thick epidermis set with very fine short hairs, 
5 or 6 delicate longitudinal lirate ribs, crossed by regular diagonal 
raised striz ; colour dull ochraceous ochre, apex dark; spire high, 
sides flat; apex fine; suture moderately impressed; whorls 53, 
rounded ; aperture circular, nearly vertical; peristome double, inner 
continues simple, with a very minute notch showing within the 
aperture; columellar margin rounded, the outer lip slightly re- 
flected. 
Size: maj. diam. 8°25, min. 6°75; alt. axis 6-0 millim. 
Operculum thin, flat, transparent, spiral of about 8 turns. 
Hab. Niah Hills (A. Bverett). 
This shell is named after Captain the Honourable Henry Keppel, 
of the ‘Dido,’ whose name occurs often in the early history of 
Sarawak and that part of Borneo. 
19°13. LAGOCHEILUS MUNDYANUS, n. sp. (Plate XXXIX. figs. 6, 
6a, 60.) 
Shell dextral, moderately solid, conical, closely umbilicated ; 
sculpture very minute transverse striz, with at distant intervals a 
fine costulate rib, very conspicuous in the very young shells, 
becoming obliterated with age; four fine spiral liree ornament the 
last whorl, with one below the periphery, very minute short hairs 
are given off from the points of intersection of the lirate bands and 
the transverse rib, but these are lost as the shell grows older; 
colour pale olivaceous, crossed by transverse bands of dark liver- 
