234 



DESCRIPTION OF A NEW SPECIES OF PAPUINA, AND 



ILLUSTRATIONS OP SOME HITHERTO UNFIGURED SHELLS. 



By G. K. GuDE, F.Z.S. 



Read Wth January, 1907. 



PLATE XXI. 



The shells forming the subject of the present article were for the most 



part received from Dr. Cox, toii;ether with the specimens of Chloritis 



treated of in the previous paper. 



Papuina complanata, n.sp. PL XXI, Fig. 12. 



Shell imperforate, trochoidal, the earlier whorls bluish white, the 

 penultimate becoming yellowish brown, the last dark brown above, 

 yellowish brown below, finely distinctly striated and with excessively 

 fine and close spirals above, and distant shallow spirJ furrows below. 

 Spire conical, apex exserted, suture shallow, margined. Whorls 6, 

 convex, increasing regularly, the last dilated towards the mouth, 

 convex above, slightly flattened at the suture, bluntly keeled at the 

 peripheiy, slightly compressed below and excavated at the umbilical 

 region, very shortly descending below the periphery in front. 

 Aperture subelliptical, very oblique, margins convergent ; peristome 

 white, thickened, expanded, and reflexed ; upper margin slightly 

 curved, outer rounded, columellar flattened, adnate to the parietal 

 wall. Diam. maj. 26-5, min. 20-5 mm. ; alt. 18 mm. 



Hah. — Probably New Ireland (Mus. Cuming). 



Type in the British Museum. A single specimen from New Ireland 

 sent by Dr. Cox was found to have its counterpart in the Cuming 

 Collection in the British Museum without habitat. The new species 

 is allied to P. vexiUaris, but is readily distinguished by its broader 

 and more flattened base, the more pronounced peripheral keel, the 

 more expanded peristome and dilated aperture, and by the absence of 

 the obliquely descending wrinkles above the periphery. 

 Papuina Feingilla, Pfr. 



A curious abnormal specimen from New Georgia, received from 

 Dr. Cox, exhibits a tendency to become scalariform, and on close 

 examination it appears to have sustained an injury to that part of the 

 mantle which forms the peripheral portion of the shell. The first two 

 whorls ai'e normal, but thence onwards the periphery becomes exserted 

 and flattened, in parts with a shallow groove ; near the end of the 

 penultimate whorl the periphery becomes again keeled, but a well- 

 defined zone about 2 mm. wide above and below the keel bulges out 

 slightly, is denuded of cuticle, and has the surface rough and 

 irregularly striated. At the aperture a short sinus occurs, with the 

 peristome thin and imperfect. The inside of the shell appears normal. 



Cetstallopsis tbicoloe, Pfr. PL XXI, Fig. 13. 

 The species was described as translucent whitish with spiral lines 

 of opaque white, but this description must have been based on a 

 decorticated shell, for a specimen in my collection has a pale yellowish 



