GUDE : ON PAPUINA COMPLANATA, ETC. 



235 



cuticle. Another specimen, however, is an albino. In some shells the 

 whorls are more glubose and the peripheral keel is less pronounced 

 than in others, while in some the last whorl is strongly gibbous behind 

 the apeiture. One specimen in my collection has the last whorl with 

 two narrow brown bands, one above and one below the peripheral 

 keel, but is without the brown articulations usually found between 

 those two bands. Dr. Cox contributes a shell with an elevated spire, 

 measuring major diam. 34, min. 28 mm., alt. 25 mm., which may be 

 designated as var. conica. It is unicolorous, opaque white with brown 

 peristome, strongly gibbous at the periphery behind the peristome, and 

 with the keel obtuse. A specimen in my collection is similar, but 

 measures alt. 24 mm., while in another the last whorl is strongly 

 deflexed in front, descending below the keel; the upper and basal 

 margins of the peristome are white, edged with pale brown. 



Tkochomoepha ceustulum. Cox. PI. XXI, JFigs. 14, a-c. 



Helix crustulum, Cox: Proc. Zool. Soc, 1873, p. 150. 



Mab. — Solomon Islands. 



This species has hitherto reniained unfigured, and I am pleased to 

 be able to give illustrations from a specimen sent by Dr. Cox. 



Rhytida Villandkei, Gassies. 



A sinistral specimen, dark brown, mottled with yellow, was received 

 from Dr. Cox. I am not aware that the reversed form of this species 

 has been recorded. 



Sab. — San Christoval, Solomon Islands. 



?Xesta Wanganensis, Cox. PI. XXI, Figs. 15, a-o. 

 Helix Wanganensis, Cox: Proc. Zool. Soc, 1870, p. 82. 



Hub. — Solomon Islands. 



Another unfigured species a specimen of which has been contributed 

 by Dr. Cox. In the original diagnosis the suture is rather vaguely 

 described " strongly marked." I find it to be very deep and 

 channelled, while the last whorl is shouldered near the suture. 

 Diam. maj. 13, min. 12 mm.; alt. 8 mm. 



DESCRIPTION OF PLATE XXI. 



Figs. 1, a-d. Cliloi-itls conom phida., u..sp. 



,, 2, a-d. ,, mmida, n.sp. 



,, 3, a-d. ,, hoiiKjdiusu, u.sp. 



,, 4, a-d. ,, exUis, n.sp. 



,, .5, u-d. ,, cugnata, n.sp. 



,, 6, a-d. ,, micrompJiala, n.sp. 



,, 7, a-d. ,, Foorei, n.sp. 



,, 8, a-d. ,, Thales, n.sp. 



,, 9, a-d. ,, misella, n.sp. 



,, 10, ii-d. ,, ohnuhiln, n.sp. 



,, 11, a-d. ,, yEtnaf/isi.s, u.sp. 



Fig. 12. Ftipnina complanata, u.sp. 



,, 13. CnjstiiUupsis tricolor, var. conica. 



Figs. 14, a-c. Trochoinorphn crustulum. Cox. 



15, a-c. ? Xestu Wunganemis, Cox. 



