MOLLUSCA OF INDIA. 125 
OxyTEs cYcLopLax, Bs, 
Helix cycloplax, Benson, A. M. N. Hist. vol. x. p. 348 (1852); 
Reeve, Conch. Icon. Helix, f. 1156; Pfr. Mon. Hel. vol. iv. p. 181; 
Conch. Ind. p. 13, pl. xxvi. fig. 7. 
Hemiplecta (sec. D) cycloplaa, Theob. Cat. Supp. p. 22. 
Nanina (Hemiplecta ?) cycloplax, Nevill’s Hand-list, p. 48. 
Oxytes cycloplax, Godwin-Austen, J. A. 8. B. 1880, p. 157. 
Locality. Daling Hills near Darjiling (W. Robert). (Plate XX XI. 
fig. 1, juv.) 
A mature shell is figured from a fine specimen in Mr. W. T. 
Blanford’s collection (figs. 8, 8a, 86); it measures—major diam. 
36-0, minor diam. 31:0, alt. axis 11:0 mm. The anatomy is that of 
the specimen fig. 1, which shows the coloured band. The generative 
organs (Plate XX XI. fig. 7), mucous gland, and mantle-lobes (figs. 
2, 3, 4) are similar to O. orobia, as described further on (p. 129). The 
central teeth of the radula are elongately triangular and straight- 
sided in form, the laterals slightly curved, straight unicuspid teeth ; 
the formula is 
Oe Od a Pe OG 
Slee eS 
The figure in ‘ Conch. Indica’ is very rough, and no basal view of 
either this or oaytes is given to show the open umbilicus. I therefore 
give additional figures of these two species. 
Original description :—“ Testa late umbilicata, orbiculato-depressa, 
supra confertim et undatim radiato-striata, striis spiralibus decussata, 
granulata, rufescenti-cornea, subtus leviore pallida, fascia mediana 
castanea circumdata ; spira conveaiuscula, apice planato, sutura ob- 
soleta, demum impressa. Anfractibus 5, planatis, ultimo subcarinato 
(atate juvenile acute carinato) antice dilatato, prope suturam antice 
tumidiusculo, subtus tumido. Apertura subquadrato-lunari, obliqua, 
intus interdum albido sublabiata, peristomate simplice, acuto, margine 
columellari non reflexo, cum basali angulum obtusatum formante. 
Umbilico profundo, perspectivo. 
“ Diam. major 42, minor 34, axis 17 mill. 
“« Hab. ad Darjiling, Himalaye Sikkimensis montem. Teste R. 
Trotter. 
‘“¢T am indebted for this fine and interesting shell to Mr. Robert 
Trotter, of the Bengal Civil Service, who collected it, with some other 
new shells, during a short visit to the Sanatarium of Darjiling, to- 
gether with a single specimen of the scarce Helix orobia, nobis, and 
some Cyclostomata previously described. Darjiling is situated at an 
altitude of more than 7000 feet above the sea-level. 
‘“« The shell is nearly related to H. oaytes, nobis, an inhabitant of 
the mountain group south-east of the Burhampooter river ; but it is 
at once distinguished from it by its sculpture, less acute periphery 
in the adult, the formation of the last whorl anteriorly, the more 
tumid base, &c.” 
