135 



the margin much wider, the head nearly double the size, compared 

 with the size of the body, and the scales on the head are small, more 

 numerous and more equal in size, and those on the edge of the hinder 

 legs are larger and more equal in size. 



Fam. 3. Trionycid^. 



Cyclanorbis Petersii. 



Shell broad, roxmded before and behind ; sternal callosities five. 



Hab. West Africa, River Gambia. 



This genus was proposed by Dr. Peters, on his return from Mo- 

 zambique, for a soft Tortoise which he discovered in that country, 

 which has flaps to the sides of the sternum, covering the legs like the 

 Amy dee of Asia, but differs from these in having no bones on the mar- 

 gin of the dorsal disk, which is soft and flexible as in the Trionyces 

 with exposed legs. 



This species from the Gambia appears to be distinct from the one 

 noticed by Dr. Peters in Mozambique ; I have therefore named it 

 after that excellent naturalist, who has made such sacrifices for the 

 extension of our knowledge of natural history, and of zoology in par- 

 ticvdar. 



8. Descriptions of Fourteen New Species of Land Shells, 



FROM THE Collection of Hugh Cuming, Esa. 



By Dr. L. Pfeiffer. 



1. Helix bisulcata, Pfr. H. testa late umbilicata, convexo- 

 depressa, solidula, spiraliter et minutissime oblique striata, nitida, 



fulvo-castanea : spira breviter conoideo-convexa, apice obtusula; 



sutura impressa ; anfr. &\ convexiusculis , ultimo multo latiore, 



peripheria obsolete angulato, antice non descendente, basi piano, 



circa umbilicum subcompresso, utrinque medio impresso -sulcata ; 



apertura parva, parum obliqua, subtriangulato-lunari ; perist. 



subsimplice, marginibus vix conniventibus, dextro recto, declivi, 



basali leviter arcuato, subincrassato. 

 Diam. maj. 29, min. 25, alt. 13 mil. 

 Hab. in Tasmania. 



2. Helix Merziana, Pfr. H. testa umbilicata, conoidea, tenui- 

 uscula, super ne subtiliter ruguloso-striata, fusca, strigis et maculis 

 lutescentibus marmorata ; spira convexo-conoidea, obtusula ,- su- 

 tura impressa, marginata; anfr. 5^ convexiusculis, ultimo acute 

 carinato, antice non descendente, basi subplano, minute striate, 

 Jlavido.juxta carinam compressam castaneo-unifasciato ; umbilico 

 latiusculo, extus subinfundibuliformi; apertura perobliqua, secu- 

 riformi, intus iridescente ; perist. subconnivente, margine dextro 

 tenui, antrorsum curvato, subdepresso, columellari et basali per- 

 arcuatis, subincrassatis. 



Diam. maj. 23, min. 20, alt. 9^ mill. 

 Hah. S. Cristoval ins. Salomonis. 



