1880.] W. T. Blanford — Contrilutions to Indian Ilalacoloqy. 205 



probably be found that many intemediate varieties occur. As a rnle, the 

 general form appears more constant than any other characters, and the 

 teeth in the mouth vary considerably. The parietal lamellas are peculiarly 

 inconstant. Thus, the original type of Streptctxis perrotteti, the common 

 species on the top of the Nilgiri hills, has two lamellae* ; but I have a 

 variety from Ootacamund in which the smaller of the two, that nearer to 

 the angle of the mouth, is obsolete, and in other specimens from the 

 same locality there is but a rudimentary representation of this plait. It 

 was the form with a single lamella which was compared with S. watsoni 

 when the latter was originally described (J. A. S. E., 1860, xxix, p. 127). 

 The variation in the teeth of Streptaxis has already been noticed in 

 these contributions J. A. S. B., 18G1, xxx, p. 359. 



The genifs Streptaxis is abundantly represented on the various hill- 

 groups of Southern India, especially on the higher elevations of the 

 Syhadri, or Western-Ghat range. The most northern locality from which 

 I jjossess a specimen is the hill-fort of Torna, near Sinhgarh, west of Poena, 

 in the Bombay Presidency. The shell in question is weathered, and not in 

 very good condition ; it is a large form (that is, large compared to the 

 minute species described in the preceding pages), measuring 11-|- mm. 

 by 8|-, and it is nearly allied to the Nilgiri S. perrotteti, and perhaps still 

 more nearly to the Ceylon S. cingalensis. 



18. Eknea mackodon, sp. nov., Plate II, Fig. 15. 



Testa -flexuose rimain, siibcylindrico-turrita, diaphana, nitidula, con- 

 fertini capillaceo-costwlata, cereo-alhida. Spira elongata, sursum paruin 

 attenunta, lateribus subrectis, apice obtuso, suturd impressd. Anfr. 7, 

 convexi, duo superiores Icevigati : ultimus aperturam versus subascendens. 

 Apertura verticalis, obliqiie semiovalis, lamella validd bicrwri intnmte 

 parletali, olid columellariprofundd, dentibusque tribus, imo tubercidij'ormi 

 columellari, alio magno lamelliformi transverso basali latus dextrum versus, 

 tertio minore in margine dextro, coarctata. Peristoma album, expansum, 

 juxta anfractum penultiinun sinuatuin, murginibus callo lamellifero junatis. 

 Long. 5, diam. vix 2, ap. long. \\ mm. 



Hab. Apud Pykara in summos montes ' Nilgiri' dictos Indiaj meri- 

 dionalis. 



Shell flexuously rimate, subcylindrically turreted, translucent, polished, 

 yollowisli white, closely sculptured, except on the ajjical whorls, with fine 

 liair-like vertical costulation. Spire turreted, elongate, diminisliing very 

 slowly in thickness upwards, the sides nearly straight, tlie apex blunt and 

 rounded, the suture impressed. Wliorls 7, convex, the first two suioolh, 

 * Petit., quoted by ri'eill'ur, Mon. llel. i. p. 9. 



27 



