Mr. L. Reeve on two new species of Shells from Cambojia. 203 



XXX. — On two new Species of Shells from Cambojia. 

 By Lovell Reeve, F.L.S. &c. 



To the Editors of the Annals and Magazine of Natural History. 



Gentlemen, 



Will you do me the favour to publish in your September 

 Number the following descriptions of two very superb and 

 striking new land- shells just received by Mr. Samuel Stevens 

 from the south-eastern corner of the Asiatic continent ? They 

 were collected by an enterprising French traveller and naturalist, 

 M. Mouhot, in the interior of the kingdom of Cambojia, lying 

 between Siam and Cochin China. No European had hitherto 

 reached the locality; and M. Mouhot relates how he accom- 

 plished the journey amidst savage tribes at great personal risk. 



Helix Mouhoti. 



Shell sinistral, deeply umbilicated, conoidly globose, rather 

 inflated ; upper portion of the whorls of a rich-toned transpa- 

 rent chestnut-colour, edged at the sutural margin with purple- 

 black ; lower portion of the whorls white, turning to a delicate 

 straw-colour by the overlying of a shining, transparent, horny 

 epidermis, encircled below the periphery and around the umbi- 

 licus with two very decided, broad, rich purple-black bands; 

 whorls six, corrugately puckered throughout at the sutural 

 margin, the first four whorls very densely granosely wrinkle- 

 striated in the direction of the lines of growth, the strise gradu- 

 ally disappearing on the fifth whorl ; aperture lunar-orbicular ; 

 lip simple, reflected partly round the umbilicus. 



Out of two thousand species of Helix at present known, 

 the only one of the same type as H. Mouhoti is the large 

 H. BrooJcei, collected by Mr. Arthur Adams, in company with 

 Sir Edward Belcher, on the mountains of Borneo, during the 

 voyage of the 'Samarang/ and described by Mr. Arthur Adams 

 and myself in the l Zoology ' of that expedition, H. Mouhoti, 

 of which Mr. Stevens has received a few specimens in va- 

 rious stages of growth, is even larger and more inflated than 

 H. Brookei. In adult specimens, the last whorl measures 

 6J inches in circumference, 3 inches in diameter, and the shell 

 is about 2 inches high. It differs from H. Brookei in being 

 conspicuously, but not broadly, umbilicated, and in the ma- 

 ture lip not being in the least degree reflected at the margin. 

 The lip itself (not the margin) is reflected at its junction with 

 the body-whorl, partly round the umbilicus, as in the Nanina 

 form of the genus. But the most striking feature of the species 



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