GORILLA. 



59 



represents the shell with the outer wall removed, discloses the 

 fact that only two parietal folds are present, corresponding to 

 the median and lower folds of the species possessing three folds ; 

 both are visible from the aperture (see fig. 15 b). The median 

 fold reaches to the parietal callus, and is long and irregularly 

 flexuons, while the lower fold is very short. Of the four palatal 

 lamella;, the first and second only are visible from the aperture. 

 The first, second, and third are broad, and ascend obliquely 

 parallel to each other, while the fourth is smaller, narrower, and 

 revolves horizontally, parallel with the lower suture. Pig. ]5« 

 shows all six barriers from behind their inner terminations. 



69, Gorilla anax, Benson. 



Helix ana.v, Benson, A. M. N. II. ser. 3, xv, 1865, p. 12; Hanley & 



Theobald, Conch. Ind. 1870, pi. 57, figs. 1-3. 

 JIeli.v (Corilin) anax, Nevill, Hand List, i, 1878, p. 70. 

 Helix {Atopa) ^rm.r, Tryon, Man. Couch, ser, 2, iii, 1887, p. 157, 



pi. 33, figs. 16-18. 

 Corilla anax, Pilsbrv, Man. Conch, ser. 2, ix, 1894, p. 148 ; Gude, 



Science Gossip, n.'s. iii, 1896, p. 126, fig. 12 (shell and armature). 



Original descriiition. — " H. testa late umbilicata, subovato 

 discoidea, utrinque concava, solidula, superue oblique costulato- 

 striata, subtus striata, nitidiuscula, fusco-castanea, subtus Isetiore ; 

 spira immersa, apice elevatiuscula, sutura subprofunda; anfracti- 

 bus 5, primis eouvexiuscnlis, ultimo convexo, antice descendente, 

 dilatato, deflexo, ad diametrum minorem angustiore ; apertura 

 perobliqua, rotundato-oblonga, lamellis 2, parietalibus, albis, 

 superiore longe intrante, sinuata,inferiore obliqua sinuata,breviore, 

 ab apertura remotiuscula, palatalibus 3, longiusculis, subprofundis 

 obliquis parallelis ab apertura conspicuis extus perlucentibus 

 coarctata ; peristomate cseruleo-albido, subcallosa, breviter reflexi- 

 usculo, marginibus callo albido junctis, inferiore subdentato- 

 incrassata. 



"Diam. maj. 23, min. 17^, axis 8 mill., apertura lata vix 10, 

 longa 9 mill." (Benson.) 



Hah. India : Travancore ; Anaraullay Hills (Bcddome). 



This is the only species of Corilla known to occur outside 

 Ceylon, being found in the southern part of India. It is of a 

 dark chocolate colour, and possesses three parietal and four 

 palatal plates. Fig. 1 6 a shows the entire sliell, four of the plates — 

 two parietal and two palatal— being visible from the aperture. 

 The parietal plates are much broader than in the other species, the 

 first curves upwards, while the second reaches as far as the parietal 

 callus ; but, unlike those of the other species, they are separate. 

 The third parietal plate is almost horizontal, with but a slight curve, 

 as will be seen on reference to fig. 16 c, the specimen being there 

 figured with the outer wall removed. Fig. 16 cZ shows the same 

 shell with part of the outer wall broken away, and the plates are 

 shown as they appear from behind their inner terminations. The 



