64 HELICID^B. 



form an oblique line parallel with the peristome, the first one 

 being nearest the aperture, whereas in C. erronea and C. fryce they 

 form a semi-circle, the second fold being nearest the aperture. 

 The shell of C. odontophora is more regularly and less coarsely 

 ribbed than that of C. erronea, and is larger, although composed 

 of only from 4 to 4| whorls, while the other two species possess 

 5 whorls. It further differs from C. erronea in that the last whorl 

 is more deflected in front, more tumid, and then suddenly con- 

 tracted behind the peristome, more resembling C. fryce in these 

 respects, as also in the presence of a quadrate tooth on the basal 

 margin of the peristome. This specimen, moreover, although 

 adult, exhibits the immature form of palatal folds (see fig. 18 a) 

 immediately behind the callus of the mouth ; the folds themselves, 

 however, have already been absorbed. 



73. Gorilla fryse, Gude. 



Gorilla fryce, Gude, Science Gossip, N. s. iii, 1896, p. 89, figs. 2, 

 4, 6, 0. 



Original description : " Testa late umbilicata. ovato-rotundata, 

 discoidea, solidula, rufo-castanea, planulata, oblique costulata, 

 subtus valde concava, striata, pernitida ; spira plana, sutura vix 

 impressa. Anfr. 5, vix convexiusculi, inter suturam et peri- 

 pheriam valde angulati, ultimus subtus ornatur striis spiralibus 

 quse secundum latus lineis vel rugis impressis obliquis decussantur ; 

 antice convexior, valde dilatatus, prof unde descendens. Apertura 

 obliqua, obtuse subcordata, larnellis 3 parietales (media elongata, 

 validaque, laterales minores, profundaeque). 4 palatales flexuosse, 

 longulse, perlucentes, 3 ab apertura visibiles. Peristoma exalbido 

 purpurescens, vel rufo-castaneus, callosum valde reflexurn, margo 

 superior sub-dentate crassior, inferior dente valido atquae 

 quadrat o armatur. 



" Diam. maj. 26, min. 20, alt. 8 mm." (Gude.) 

 Hob. Ceylon : Albion Estate, Lindula Districts (Mrs. Fry} ; 

 Ambegamuwa (Cottett). 



Fig. 19. Gorilla fry &. 



Corilla fryce differs from C. erronea in being more rounded in 

 outline, larger, darker in colour and more shining beneath, the 

 ribs are more regular and less coarse ; the whorls are less convex, 

 almost flattened and distinctly angulated, almost keeled, midway 

 between the suture and the periphery, while the suture is less 



