38 zoi^rnojE. 



horny, with a dull resinous lustre, plicately striated, sometimes 

 more or less undulated transversely to the whorls above, and 

 decussated by fine subdistant impressed lines, occasionally obso- 

 lete, smoother below ; spire convex, suture not impressed ; whorls 

 4|-5, rather rapidly increasing, almost flat above, the last more 

 convex, keeled at the periphery, the keel often disappearing near 

 the mouth, convex below, the convexity below the keel deeper 

 than the spire is high ; aperture oblique, subovally lunate ; peri- 

 stome thill, columellar margin curved, briefly reflexed, nearly 

 covering the perforation. 



Major diam. 22, min. 18, axis 11 mm. 



Jictb. The higher ranges of South-western Ceylon ; Horton 

 Plains (Lai/ard) ; Mt. Pedro Talla Galla, above Newara Eliya 

 (JI. Nevill). 



[The anatomy is exactly like that of A. chenui and the radula 

 has the same formula (see p. 44). The two species have very 

 close relationship. A. chenui, however, is from a lower altitude, 

 ranging to the coast-line ; whereas cercma is from the higher 

 ranges of Ceylon (H. B. Preston), a difference of conditions quite 

 suflicient to have brought about dissimilarity in the shells.] 



The figures of this shell by Keeve and Hanley are poor. The 

 shape resembles that of A. bistrialis. A. novella is more closely 

 wound and the sculpture is different. 



B. Shell s_[nraTly handed tuith colour' more or less distinctly. 

 a. Decussated hut not grooved. 



67. Ariophanta ligulata, Fer. (Helix) Hist. iV«f. pi. 31, tig. 2 (1819- 

 21) ; Pfr. (Helix) 3Ion. Hel. i, 1847, p. 71 ; id. t. c. vii, 1876, 

 p. 122 ; H. Sf T. (Helix) C. I. 1876, pi. 28, fig. 9 ; Nev. (Nanina- 

 PXesta) Hand-l. i, 1878, p. 50; Godioin-Austen (YieWiC), J. A. S. B. 

 xlix, 1880, p. 158, t. 11, fig. 3 (acimal) ; id. (Nilgiria) Mol. Ind. 

 ii, 1899, p. 123, pi. 98, tigs. 1-1 d (animal, genitalia, and 

 sculpture). 

 ? Nanina turbinata, Beck, Ind. Mol. p. 4 (1837, no descr.) ; Morch 

 (Cryptozona), Jour. Conch, xx, 1872, p. 335 ; Pfr. (Helix) Man. 

 ml vii, 1876, p. 90. 



Shell narrowly perforate, depressedly globose, finely marked 

 with rather flexuous plicate striatiou, faintly decussated with 

 subdistant impressed Hues, whitish, generally brownish above the 

 jjeriphery and inside each suture, the dark colour forming a spiral 

 band with an indistinct inner border ; spire depressedly conoid, 

 varying in height, apex acute, suture impressed ; whorls 5|-6i, 

 slightly convex, regularly and slowly increasing, the last sub- 

 angulate at the peripheiy, convex beneath ; aperture oblique, 

 lunate; peristome simple, thin, slightly reflected at the base and 

 near the umbilicus. 



Major diam. 26, min. 23, height 17 mm. 



Hah. The eastern portion of Peninsular India ; known localities 

 are Patna, Bliagalpur (on the Ganges), Manbhum, Ciittack, 

 Madras, and other places in the Caruatic. Except in the height 

 of the spire, there is but little variation. 



