2l6 W. T. Blanford — Contrihutions to Indian Malacology. [No. 4, 



shown to me by Mr. Theobald, and I told him my views on the subject, 

 but he did not agree with me. 



I have recently examined the specimen of O. tortuosus (two in num- 

 ber) at the British Museum, and find the views I expressed several years 

 since (J. A. S. B., 1869, xxxviii. pt. 2, p. 138) as to its alliance to 0. cal- 

 cadensis fully confirmed. In form, C. tortuosus, G. calcadensis, G. costula- 

 tus, and G. albescens are closely allied, all being much more ovate than any 

 of the other species of the genus. The sculpture on C. tortuosus is much 

 finer than on G. calcadensis, or even than on G. albescens. The discovery 

 of two additional forms of this section of the genus in the hills of Southern 

 India, and the absence of the genus from the collections hitherto made in 

 the Nicobar Islands, tend to support the probability that G. tortuosus is 

 also in reality a Southern-Indian form. Not a single Gataulus has hitherto 

 been discovered in the Andaman Islands, in any of the countries to the east 

 of the Bay of Bengal, or in the Malay Islands, so that the existence of the 

 genus in the Nicobar Islands is extremely improbable. 



29. Eealia (Omphaioteopis) andeesoni, sp. nov., Plate II, Fig. 18. 



Testa perforata, ovato-conica, tenuiuscula, rufescenti-fulva, Icevigata, 

 parum nitida, obliqtie striatula. Spira conica, lateribtis suhrectis, apice 

 acuto, siiturd leviter impiressd. Anfr. 7, planiusculi ; tiltimus ad peri- 

 plieriam capillaceo-carinatus, subtus convexus, Icevigatus, radiatim striatwlus, 

 carina circmiunibilicari ohtusd, fere obsoletd instructus. Apertura ovata, 

 obliqua, fere diagonalis, spiram altitudine liaud cBqtians. Feristoma obtu- 

 suin, marginibus subconniventibus, callo tenui junctis, externo recto, basali 

 expansiusculo, columellari subtus expanso, juxta perforationem emarginato, 

 angulatim inciso, Opcrc. ? Long. 7, diam. vix 5; ap. long. 3|^, lat. 2|- mm. 



Hab. In iusulis Andamanicis {J. Anderson). 



Shell perforate, ovately conical, thin, reddish brown in colour, smooth, 

 not polished, obliquely striated. Spire conical, with sides nearly straight, 

 apex acute, suture slightly impressed. Whorls 7, rather flat ; the last with 

 a hair-like keel at the periphery (the keel sometimes appearing on the 

 upper whorls just above the suture), convex, smooth, and radiately striated 

 below, and furnished with an obtuse, subobsolete keel around the umbili- 

 cus, the space inside the umbilical keel being smooth, not ribbed. Aperture 

 ovate, oblique, nearly diagonal, a little shorter than the spire. Peristome 

 obtuse, the margins approaching each other, and joined by a thin callus; 

 outer edge straight, basal expanded, coluraellar expanded below, but emargi- 

 nate and cut away into a re-entering angle near the perforation. Length 

 29, diameter 019 ; length of aperture 0'13, breadth Oil inch. 



