(hi uric LdH'l- Siitdls from Xeiv Caledonia. 217 



XX\ HI. — Descriptions of Xine new Species of LdnJ-Shells 

 from jS'eio Caledonia. By II. B. PltESTON, F.Z.S. 



When recently working tlivougli a quantity of New Caledonian 

 land-shells I tound a number of forms which seemed to be 

 difficult of determination; these I submitted to Mr. G. K. 

 Glide, who, with his unfailing courtesy, assisted me in identi- 

 fying a certain number. There were, however, several 

 species which Mr. Glide suggested might be new, and having 

 compared these carefully u itii all available material, I now 

 venture to describe them as follows: — 



Charopa ahena^ sp. n. (Fig. 1.) 



Shell depressed, subdiscoidal, thin, bronze-coloured; whorls 

 3-4, sculptured with moderately fine arcuate ribs; sutures 

 presenting an almost channelled appearance ; umbilicus 

 rather wide; aperture lunate ; peristome simple. 



Alt. 2, diam. maj. 4*5 mm. 



Aperture : alt. 1*25, diam. 1 mm. 



Jiab. New Caledonia. 



Ihis form shows some affinity with C. dispersa, Gass. *, 

 the chief characters which separate it from that species being 

 its more depressed spire, rather coarser sculpture, and 

 shallower and narrower umbilicus ; it has also one whorl 

 less than C. dispersa. 



Charopa Margueritce, sp. n. (Fig. 2.) 



Shell depressed, rather thin, yellowish-brown, blotched, 

 streaked, and spotted with chestnut ; whorls 4-5, sculptured 

 with fine arcuate ribs; spire slightly sunken ; sutures deeply 

 impressed; umbilicus wide; peristome sim|)le; columella 

 descending very obliquely ; aperture obliquely lunate; inte- 

 rior ot shell blaring a callus on the parietal whorl. 



Alt. 2'2o, diam. maj. G'25 mm. 



Aperture : alt. 2"25, diam. maj. 1 mm. 



hah. New Caledonia. 



In some respects allied to C. vetula, Gass.f. It is, however, 

 much larger and more depressed; it is not so closely coiled, 



• Gassies, "Faune Concliyliologique Terrestre et Fluvio-lacustre de 

 la Nouvelle CalMonie," pt. i., Actes Soc. Linn. Bordeaux, xxiv. 1861, 

 p. 233. 



t Gassies, ibid. pp. 233-234. 



Ann. d- Mog. X. Hist. Sor. 7. Vol. xix. 15 



