300 PUPILLID^E. 



inside with 5 lamellar teeth, 4 of which are equidistant and 

 opposite to each other, at the upper and lower corners of the 

 mouth, so as to form a partial St. Andrew's cross, while the fifth, 

 which is smaller, is close to and above that at the upper corner of 

 the parietal margin. Peristome free, simple, broadly expanded 

 and trumpet-shaped." (Stanford,) 



Major diaiii. 3, minor 2'2, alt. 2 mm. Diam. of peristome 

 1 mm. 



Hab. Burma : Mya Leit Doung, Ava (Blanford, Oldliam). 



" The differences between this shell and Hypselostoma tubiferum, 

 Benson, hitherto the only known species of the genus, are 

 numerous. That shell has the spire scarcely exserted, while 

 the last whorl ascends so much that the mouth, which is hori- 

 zontal, is on a level with the apex. In the present species the 

 spire is conical, the mouth nearly vertical, and the last whorl 

 only ascends very slightly. In H. tubiferum also, there are more 

 teeth in the mouth, they are situated further back from the 

 aperture, and are somewhat differently disposed, the upper two 

 lamellae being produced in front of the others, and forming an 

 imperfect tube. There are also minor differences in striation, 

 umbilicus, etc. Nevertheless the general appearance of the two 

 species is strikingly similar, and the peculiar shape of their whorls 

 and mouth recalls those of the Brazilian genus Anostoma, Lam." 

 (Blanford.) 



Some specimens in the Theobald collection measure : major 

 diam. 3, min. 2, alt. 2 mm. (including the peristome). 



269. Hypselostoma dayanum, Stoliczlca. 



Hypselostoma dayamim, Stoliczka, J. A. S. B. xl, 1871, p. 172, pi. 7, 

 fig. 2; Hanley & Theobald, Conch. Ind. 1876, pi. 147, fig. 10; 

 Pfeiffer, Mon. Ilelic. Viv. vii, 1876, p. 488; Pfeiffer & Clessin, 

 Nomencl. Helic. Viv. 1881, p^ 344. 



Pupa (Hypselostoma} dayana, Nevill, Hand List, i, 1878, p. 193. 



Original description: " Hypselostoma testa minuta, conoidea, 

 solidula, pallide brunnea, apice obtusiuscula, late profundeque 

 perspective umbilicata ; anfractibus 4, convexis, stituris profundis 

 sejuuctis, primo Isevigato, submammillato, ceteris striis increment] 

 subobsoletis notatis, ultimo maximo, fere plane voluto, supra ad 

 peripheriam subangulato, deinde sensim angustiore et ad marginem 

 umbilici rursus obtuse angulato ; apertura fere verticali, vix 

 descendente, conspicuiter dilatata, subcirculari; marginibus junctis, 

 intus crassiusculis et plicose dentatis ; labio adnato modice ex- 

 pansiusculo, bidentato, dente superiore majore ; labro six-dentato ; 

 dentibus duobus in regione columellari sitis subdistantibus, alteris 

 duobus, in margine externo, similariter inter se remotis, seel 

 duobus in marg. basali sitis approximates, parvis. 

 "Diam. maj. I'l, d. min. 0*8 ; altitudo 1 mm." 

 Hab. Burma : Damotha near Moulmain. (Stoliczka.) 

 " It is the third known species of the genus. In general form 



