156 :\Ir. II. C. Fulton on 



but easily (listiiigulshccl by its flatter form ami sinallor 

 npcrtuio. 



8omc specimens nvo almost a unifonn brown, whilst otluMvs 

 are strikingly marketl witli yellowish-wliite, narrow, oblique 

 streaks. 



Named after ^lons. Pii. Daiitzenberg, one of our most 

 esteemed concholoy'ist.-'. 



Cyclojihorns {CycloheUx) Kiblerij sp. n. 



(I'i. X. fig. 4.) 



Sliill tuibinate, very narrowly umbilicated, very solid, 

 nucleus consisting of 2.', whorls, first one and a h;ilf smooth, 

 the next with rather distmt curved stride, remainder of shell 

 with fine oblique stria3, crossed by clo.se-set microscopic 

 spirals which are "waved on the underside of body-whorl, rich 

 dark brown colour, with numerous irregularly sha])ed spots 

 and streaks of lighter colour ; on the underside of shell the 

 markings take a more regular spiral pattern ; whorls 5^, 

 convex, the last a little flattened below ; aperture orange- 

 coloured within, very oblique, subirregularly oval ; peristome 

 orange, well thickened, margins approaching and connected 

 by a transparent callus, columellar |)Ortion sloping towards 

 the right, with a blunt tooth-like |)rojection about the middle; 

 operculum corneous, thin, about 8 whorls. 



JMaj. diam. 3H, alt. 27 mm. 



Jfab. Nias Island, N.W. Sumatra. 



This shell is of a similar form to C iurho^ Chem., from 

 the Nicobar Islands, but cannot possibly be confused with 

 that or anv other species of the genus knuwMi to nie. 



Cychlus niasensisj sp. n. (PI. X. fig. 9.) 



Shell depressed, spire almost plane, apex dark coloured, 

 somewhat roughened and slightly exserted, rather thin, 

 covered with a somewhat thick closely striated epidermis ; 

 whorls 4^, moderately convex, last shortly and slightly 

 descending, suture deep ; aperture circular, bluish white 

 wifjiin; peristome with narrow outer flange; operculum 

 calcareous, whorls 9. 



Maj. diam. lo, alt. 6 mm. 



Ilah. Nias Island, Sumatra. 



The nearest to this known to me is C. discoideits, but 

 C. niasensis is smaller, the peri.stome does not descend so far, 

 and the epidermis ajtpears to be thicker. 



