Cw 
1889. ] LAND-SHELLS FROM BORNEO. 345 
Cyclotus ptychoraphe, v. Martens. 
Cyclotus ptychoraphe, v. Martens, Monatsber. d. Berlin. Akad. 
1564, p. 117; Preuss. Exped. Ost-Asien, Die Landschnecken, p. 125, 
pl. ii. fig. 11 (1867). 
Hab. Singkawang, Borneo; rare (v. Martens). 
32. CycLorus Linitus, n. sp. (Plate XXXVI. fig. 3.) 
Shell globosely turbinate, rather openly umbilicated ; sculpture 
the first two apical whorls show distinet liration, 14 on the whorl, it 
thence is suddenly smooth and transversely striated ; spire conic ; 
apex papillate; suture deep; whorls 4, very rounded ; aperture 
circular, subvertical ; peristome simple, not thickened. 
Size: maj. diam. 7°25; alt. axis 3°5 millim. 
Operculum shelly in front, multispiral. 
Hab. Busan Hills (A. Everett). 
There are a large number of specimens in the collection, all 
covered with a black substance completely concealing the form of 
the shell ; a state so often seen in certain species of Alyceus, and as I 
have observed in those that have a burrowing habit. In this Cyclotus 
the shells are more completely coated than usual. The drawing is 
from one cleaned after a soaking in warm water. 
4th Group. Cyc/oti liratuli. 
Shell turbinate, with high spire, with spiral ribbing; aperture 
simple, not reflected. 
33. CYCLOTUS TRILIRATUS. 
Cyclostoma triliratum, Mart. u. Chem. Conch.-Cab. ed. ii. p- 363, 
pl. xlvii. figs. 8-10. 
Cyclophorus triliratus, Reeve, Conch. Icon. pl. xix. fig. 96 (1861). 
Cyclostoma quadrifilosum, Benson, Aun. & Mag. Nat. Hist. ser. 2, 
x. p. 270 (1852). 
In Dr. Hungerford’s collection. : 
Cyclotus angulatus, v. Martens. 
Cyclotus angulatus, vy. Martens, Jahrb. d. deutsch. Malakozool. 
Gesell. i874, ps ot 
Jerponia, Blanf. 
34. JeRDONIA? BoRNEENSIS,n. sp. (Plate XXXVI. figs. 6, 6 a.) 
Shell dextral, pyramidal, turreted, strongly lirate, openly umbili- 
cated ; sculpture 5 strong longitudinal ribs on the whorl, the two 
below and the three above separated by a wider interval ; two strong 
closely placed longitudinal ribs run with the angulate margin of the 
umbilicus, and one fine rib within it; colour pale greenish horny ; 
spire high ; apex rather pointed; suture angulately open; whorls 6, 
angularly convex ; aperture oval, oblique, not double ; peris‘ome 
simple, with a marked sinuation or shallow notch on the lower 
margin ; columellar margin rounded and slightly thickened. 
Size: maj. diam. 2°7 ; alt. axis 2:3 millim. 
