56 



y. Three parietal folds. 



*. Shell elliptic, palatal folds short, second 



scarcely curved. 

 f. Lip much reflected. 



. Two upper palatal folds terminating 



near the peristome colletti. 



. Palatal folds terminating further 



back carabinata. 



tt. Lip little reflected. 



. Shell strongly and regularly ribbed . . gudei. 

 . Shell more faintly and irregularly 

 ribbed. 



1. Third palatal fold almost hori- 



zontal erronea. 



2. Folds very short, nearer aperture, 



third palatal fold very oblique, 



ascending v. ei'ronella. 



**. Shell rounded, palatal folds longer, 



second much curved fryce. 



67. Gorilla adamsi, nom. mut. 



Helix charpentieri, Pfeiffer, P. Z. S. 1853, p. 127 (non Helix char- 

 pentieri, Scholtz, Schlesien's Land- und Wasser-Moll. 1843, p. 28) ; 

 Reeve, Conch. Icon, vii, 1854, pi. 185, fig. 1285; Hanley & 

 Theobald, Conch. Ind. 1870, pi. 14, fig. 1 ; Brot, Journ. Conchyl. 

 xii, 1864, p. 22, pi. 2, fig. 11. 



Gorilla charpentieri, Frauenfeld, Verh. K.-K. zool.-bot. Ges. xix, 

 1869, p. 876; Gude, Science Gossip, N. s. iii, 1896, p. 88, 

 fig. 1. 



Helix ( Corilld) charpentieri, Nevill, Hand List, i, 1878, p. 70. 



Helix (Atopa) charpentieri, Tryon, Man. Conch, ser. 2, iii, 1887, 

 p. 156, pi. 33, figs. 9, 10. 



Original description : " Testa umbilicata, discoidea, solidula, 

 oblique costato-striata, parum nitida, virenti-cornea ; spira regu- 

 lari, plana ; anfractibus 5J, lente accrescentibus, modice convexis, 



Fig. 12. Gorilla adamsi. 



ultimo rotundato, antice profuude descendente ; urnbilico lato, 

 conico, subirregulari ; apertura fere horizontal!, rotundato-lunari, 

 intus albida, prorsus edentula ; peristomate albo, undique late 

 expanse et reflexo, marginibus convergentibus, infero ad inser- 

 tionem attenuate." (Pfeiffer.} 



Diam. maj. 27^, min. 22, alt. 9 mill. 



Hob. Ceylon (Layard, Colleti) ; Nanu Oya jungle (Preston). 



Among all the known species of Gorilla the present one is 



