GORILLA. 



63 



Helix (Aiopa) odontophora, Tryon, Man. Couch, ser. 2, iii, 1887, 



p. 157, pi. 33, ligs. 24-26. 

 Corilla odontophora, Pilsbiy, Man. Conch, ser. 2, ix, 1894, p. 148 ; 



Glide, Science Gossip, n. s. iii, 1896, p. 91, tig. 10 (shell and 



armature). 



Original description : — " H. testa late umbilieata, rotundato- vel 

 ovato-discoidea, solidula, castanea vel rufescenti-lutea, supenie 

 subplanulata, oblique tenuiter costulato-striata, subtiis valde 

 coucava, striata, uitida ; spira planiuscula, versus apicem obtusum 

 elevatiore, sutura impressa ; anfractibus 4, primis convexiusculis, 

 ultimo antice convexiore, tuni desceudeute, dilatato-deflexo, subtiis 

 valde inflato ; apertura perobliqua, obtuse subcordata, lamellis 2 

 parietalibus (superiore louge iutrante curvata, inferiore sub- 

 parallela, breviore, subcurvata, ab apertura remotiuscula), pala- 

 talibus 4 brevibus semiluuaribus vel sinuatis (omnibus integris ab 

 apertura conspicuis, extus perlucentibus) coarctata ; peristomate 

 purpurascenti-albido vel castaneo, calloso, bi'eviter reflexo, margi- 

 nibus superiore et inferiore subdentato-incrassatis. 



" Diam. maj. 22-26, min. 17-19, alt. 7-8 mill." (Benson.) 



Hah. Ceylou : Port McDonald {Layard) ; Uda PussellaAva 

 (Preston). 



The figure given of C. edontopJiora in Couch. Ind. pi. 57, fig. 4, 

 and copied in Tryou's work, pi. 33, fig. 24, is somewhat misleading, 

 as it evidently represents an immature specimen, although no 

 reference is made to this fact. The figures now reproduced 

 illustrate a specimen in Mr. Ponsouby's collection. On reference 

 to fig. 18 b it will be seen that only two parietal folds are 



Fig. 18. — Corilla odontophora. 



present. Fig. 18 c exhibits the barriers as seen from behind their 

 inner terminations, and it will be observed that there are four 

 palatal folds, the upper three (visible through the shell-wall) are 

 shown in figs. 18 (? and 18^, while fig. 18 a exhibits the under- 

 side of the shell with the third and fourth folds showing through. 

 They are much shorter and less flexuous than in either C. erronea 

 or C. frijce and, as stated by Benson, are entirely visible from the 

 aperture. Another point to be noted is that the outer termin- 

 ations {i. e. nearest the aperture) of the upper three palatal folds 



