1889. ] LAND-SHELLS FROM BORNEO. 353 
Helicina martensi, Issel. 
Helicina citrina? (Pfr.), var., v. Martens, Malak. Blatt. 1873, 
Bp. .01. 
Helicina martensi, Issel, Moll. Born. Ann. Mus. Civ. Genova, 
vi. p. 444, pl. vi. figs. 23-25 (1874). 
Gerorissa, Blanf. 
Ny 1967 59. GEorIssA HOSEI, n. sp. (Plate XXXIX. fig. 11.) 
By 1953 
hy, 983 
Shell elongately conoid, rather solid, imperforate ; sculpture ill- 
defined spiral liration ; colour ruddy ochraceous; spire high; apex 
blunt; suture impressed; whorls 4, sides flat, angulate-above and 
below on the periphery, the median side of each whorl being parallel 
with the axis of the shell, more rounded on the last whorl; aperture 
oval, oblique ; peristome simple, somewhat thickened above; colu- 
mellar margin straight. 
Size: maj. diam. 1°5; alt. axis 1-9 millim. 
Hab. Borneo (C. Hose, 1889). In Brit. Mus. collection. 
The square form of the second worl is peculiar, and distinguishes 
it from the other Bornean species. Only two specimens are in the 
collection. The exact locality I have not yet ascertained ; it 
occurred among a small collection of shells sent to the British Mu- 
seum by Mr. Hose in May 1889, which Mr. Edgar Smith has kindly 
let me figure and describe. 
60. Grorissa WILLIAMSI, n. sp. (Plate XXXIX. fig. 10.) 
Shell elongately ovate, solid ; sculpture indistinct spiral liration, 
showing strongest on the apical whorl; colour ruddy ochraceous ; 
spire high ; apex blunt, smooth ; suture well impressed ; whorls 43, 
convex, the last very ample; aperture oval, oblique; peristome 
simple, sharp-edged ; columellar margin straight, 
Size: maj. diam. 1°7; alt. axis 2°30 millim. 
Hab. Borneo (C. Hose). In Brit. Mus. collection. 
Only one example occurred among four specimens of Georisse 
sent by Mr. Hose to the British Museum, oue being G. niahensis, 
and two others of a new species and very distinct form, which I have 
named G. hosei. I have named this species after Dr. Williams, who 
served with Rajah Brooke on the first occupation of the country. 
61. GrorISSA NIAHENSIS, n. sp. (Plate XXXIX. fig. 8.) 
Shell elongately conoid, solid, imperforate; sculpture a very in- 
distinct, ill-defined spiral liration, about 20 on the penultimate whorl, 
upon a rough surface crossed by transverse lines of growth; colour 
ruddy ochre; spire high; apex pointed, finely papillate, minutely 
lirate; suture impressed ; whorls 44, convex ; aperture oval, 
oblique; peristome simple, acute below; columellar margin 
straight. 
Size: maj. diam. 2°3 ; alt. axis 3°6 millim. 
Hab. Niah Hills (A. Everett). 
