SYKES : NON-MARINE SHELLS FROM THE EAST INDIES. 89 



above the periphery, the lower behig the broader, and a third white zone at 

 the suture, noticeable for a whorl and a half from the mouth ; mouth broadly 

 ovate, large, lip well expanded, and slightly reflected on the outer margin, 

 more noticeably so on the columellar margin and at the base, the exter- 

 nal colouring of the shell is seen inside the mouth, and the colouring is 

 produced to the edge of the lip. 



Diam. max. 30 ; alt. (to base of lip) 12 millim. 



Var. a. Similar to type, but the crest stronger, the colour a pale straw 

 yellow with a white zone just above the periphery and narrower brown zone 

 just below, with indications of another white zone just above this and at the 

 suture ; periostracum a little more noticeable. 



Diam. max. 28; alt. (to base of lip) 12 millim. 



Hah. — Gebi Island. 



Planispira (Cristigibba) fruhstorferi, n. sp. 



PL ix, figs. 9, 10. 



Shell almost flat, horn-brown, openly umbilicated ; sculpture well-marked 

 lines of growth and a number of closely-set, small, pits, resembling the hair- 

 scar markings seen on species of Albersia, and showing that when alive the 

 shell is clothed with a deciduous hairy periostracum ; whorls 4^ — 5, convex, 

 and separated by a deep suture, the last whorl is swollen and has a well- 

 marked crest behind the outer lip ; mouth descending above, ovate, with a 

 darker brown marking just inside, lip whitish-horn colour, lightly incrassate 

 and subreflexed, a very thin callus joining the margins. 



Diam. max 13.8 ; alt 6.5 millim 



Hah —Obi. 



A small form, whose most striking characters are its imiform brown 

 colour and its sculpture. 



Obba subgpanulata, n. sp. 



PL ix, figs. 5, 6. 



Shell perspectively umbilicated. depressed, with a very acute peripheral keel ; 

 pale brown, with two chestnut bands above the periphery and two below ; 

 those nearest the periphery being by far the wider ; protoconch light 

 chestnut; smooth, save for radiating lines, the residue of the shell 

 minutely irregularly granulate, with a few scattered hairs on the last whorl, 

 and some wrinkles behind the lip ; whorls 4^ — 5 flattened, the last whorl much 

 descending at the mouth and somewhat compressed ; apertuie very oblique, 

 outer margin acutely angled, lip moderately thick, expanded, reflected, white, 

 with a fairly thick callus joining the margins. 



Alt. 10; diam. max. 27 millim. 



Hah. — Batjan. 



