472 



This species is still allied to the preceding one, but as the upper part of aperture has 

 been broken and repaired during life, it is impossible to give a sufficient description, the 

 spiral sculpture is much finer than in the preceding species. 



3. CylicJina Sibogae n. sp. PI. XXXII, fig. 7. 



Siat. 193. Sanana-bay, East coast of Sula Besi. 22 M. Mud. i Spec. 



Shell cylindrical, rounded at both ends, slightly truncated above, rather solid, opaque, 

 white. Sculpture consisting of hair-like growth-striae, a few rather coarse, groovelike, spiral 

 striae above, and some more superficial ones below, these latter occupying a larger space 

 than the upper ones, about one third of the shell is not spirally striated. Spire narrowly but 

 deeply umbilicated, the upper part of the umbilicus enamelled, bordered by an acute keel. 

 Aperture narrow above, larger below, its upper margin scarcely ascending, outer margin rounded 

 at first, then nearly straight, slightly contracted, a little dilated below, basal margin regularly 

 rounded. Columellar side, along the body, convex at the ends, straight in the median part, 

 enamelled; columella scarcely concave, formed by a thick, scarcely contorted fold, covering the 

 umbilical slit. 



Alt. from margin of spire to base of apert. 5, lat. 2 ; apert. alt. 5Y0, lat. above Vg, 

 below I Mill. 



Same observation as for N*^ i : it is no agreeable task, to describe new species in such 

 a large genus, the danger of redescribing known species is not small, but I have in vain tried 

 to identify them; from C. java?iica it is easily separable by its smooth median part. 



4. Cylichna sp. 



Stat. 139. o°ii'S., 127° 25' E. Near Batjan. 397 M. Mud. stones and coral, i Spec. 



This specimen is incomplete, part of the columellar side is wanting, so I have not 

 named it, though probably it will be new. 



5. Cylichna (Mnestia) bizona A. Adams. 



Adams. Thes. Conchyl. Vol. II, p. 595, PI. 125, fig. 148. 



PiLSBRY. Man. of Conch. Vol. XV, p. 323, PI. 27, fig. 84. 



KOBELT. Martini-Chemn. Conch. Cab. Ed. II, Vol. I, BuUacea, p. 62, PL 11, fig. 10. 



Stat. 261. Elat, West coast of Great-Kei-island. 27 M. Mud. i Spec, 



The brown zones are rather narrow and less deeply coloured, but otherwise I see no 

 differences with the descriptions and figures, quoted above. 



6. Cylichna {MnestiaT) sp. 



Stat. 105. 6°8'N., 121° 19' E. Sulu-archipelago. 275 M. Coralbottom. i Spec. 

 The only specimen seems to be allied to the preceding species, but it is a worn shell, 



