206 W. T. Bknfoi-d — Contr Hut ions to Indian Malacology. [No. 4, 



the last ascending very slightly near the aperture. Aperture vertical, 

 semioval, obliquely truncated above, and very much contracted by teeth, 

 consisting of a strong re-entering bifid parietal* plait on the callus con- 

 necting the margins of the peristome, an internal re-entering columellar 

 lamina, commencing at a distance within the mouth, and three teeth — one, 

 more or less tubercular, on the left or columellar side, a second tubercular 

 tooth on the right margin, opposite the parietal plait, and with it nearly 

 cutting off the posterior corner of the aperture, and a third, broad, lamelli- 

 form, and transverse (parallel to the plane of the mouth) on the right side 

 of the basal margin. Peristome white, expanded throughout, curved a 

 little back near the angle, where it meets the penultimate whorl, the mar- 

 gins united by a callus bearing the parietal lamella. Length 0'21, diameter 

 0'075, length of aperture 0'05 inch. 



I obtained several specimens of this shell near Pykara, on the Nilgiri 

 hills of Southern India, in 1858, and for a long time supposed it to be JE. 

 pirriei of Pfeiffer,t but I noticed it as a distinct form when describing 

 sculpta (J. A. S. B., 1869, xxxviii, pt. 2, p. 141), and mentioned some 

 of its peculiarities. E. macrodon is distinguished not only from M pirriei, 

 but also from all other Indian species of the genus, by its strong basal 

 transverse lamelliform tooth. This character serves to distinguish the two 

 species at all ages ; for in the present species, as in M. sculpta, E. pirriei, 

 and, doubtless, in the two forms (-£/. exilis and JE. suhcostulata) described 

 below, the apertural teeth, and especially the parietal lamella, are well 

 developed in immature shells even before all the whorls are completed. 

 JE. macrodon, too, is only half the size of JE. pirriei, and there appear to 

 be several slight differences in form, sculpture, and dentition. 



19. EisrifEA STJBCOSTTJLATA, sp. nov., Plate II, Fig, 14 {upper). 



Testa arcuato-rimata, suhci/lindrico-turrita, diapliana, nitida, cereo- 

 albida, confertim suhohsolete costulata. Spira parum attenuata, laterihus 

 convexiusciilis, apice ohtuso, sufurd impressd. Anfr. 7^, convexiusculi, 

 ultimus antice hreviter ascendens. Apertura verticalis, oVli^ue semiovalis, 

 lamella validd intrante hicruri, Jiexuosd, parietali juxta angulum, alia pro- 

 fundd columellari, et quatuor dentibus, uno columellari, duohus hasalihus, 

 quarto dextrali plicce parietali opposite, coarctata. Peristoma expaiisum, 

 alhidum, juxta anfr actum penultinmm sinuatmi, marginihus callo lamelli. 

 fero junctis. Long. diam. 2, ap. long. 1^ mm. 



* For tlie meaning of the terms palatal, parietal, and columellar, applied to teeth 

 ■within the mouth, see Pfeiffer, Mon. Hel. ii, p. 300, note. 



+ It was quoted as that shell, J. A. S. B., 1860, sxix, p. 126, and 1861, xxx, 

 p. 36-k 



