Mr. W. H. Benson on some forms c;/ Stenothyra. 497 



iv^This shell was found by Dr. Cantor in company with St. 

 glabrata, A. Adams^ but more rarely. Its narrower elongated 

 form distinguishes it from all previously described species. 

 The sculpture has some resemblance to that of St. polita^ Sow., 

 and to that of the species next to be described. 



2. Stenothyra moniliferay nobis, n. s. 



Testa subperforato-rimata, oblongo-ovata, compressiuscula, nitidi- 

 uscula, sulcis confertioribus, dense puncticulatis, spiralibus im- 

 pressa, fusco-cornea, fascia pallida supra mediam ornata, versus 

 apicem obtusulum hyalinum rubente, spira convexo-conica, sutura 

 profunda, canaliculata ; anfractibus 4y convexis, ultimo subsoluto, 

 f testae sequante, antice valde descendente, subtus rotundato, pe- 

 riomphalo subcompresso ; apertura obliqua diagonali, rotundato- 

 ovali, sulco profundiori ab anfractu penultimo divisa, peristomate 

 obtusulo, callo parietali superne solum conspicuo. Operculo cor- 

 neo-pellueido, apice ad dextram spectante. 



Long. A\, diam. 3 mill. 



Hab. ad Mergui Burmanorum. Teste W. Theobald. 



Distinguished from the last by its form, more developed 

 sculpture, colour, want of polish, and peculiar umbilical rimation. 



3. Stenothyra foveolatttj nobis, n. s. 



Testa vix rimata, ovato-acuta, spiraliter foveolato- striata, striis versus 

 basin confertissimis, spira conica, apice acute, sutura mediocri ; 

 anfractibus 5 convexiusculis, ultimo ad ventrem planiusculo, -j 

 testae aequante, antice descendente, basi rotundato ; apertura ob- 

 liqua, rotundato-ovata, peristomate obtuse, margine parietali sulce 

 mediocri ab anfractu ventrali separate. Operculo ? 



Long. 5, diam. 3i mill. 



Hab. in Gange fluvie, prepe Sikrigali. Teste Capt. T. Hutton. 



This shell has reached me in a weathered condition, so that 

 the colour and the normal condition of the surface cannot be 

 exactly described. Its form, however, and the pitted lines seem 

 to mark it as a distinct species. In form it resembles the small 

 St. puncticulata, A. Adams, from the Eastern Isles ; but in that 

 species the puncticulate lines are faint and distant, and not 

 closely set even towards the base, while a scarcely compressed 

 ridge runs down by the side of the slightly impressed rimation 

 and joins the columellar margin below it, a feature not found in 

 the Gangetic shell. Another Stenothyra resembling foveolata 

 in the characters of the aperture, and marked with deUcately 

 puncticulate lines, was found with it, but, from the imperfection 

 of the spire, its identity with it cannot be safely declared. The 

 degree of closeness between the lines is about the same, and the 

 surface is of a pale horn-colour, as in some specimens of St. Delta.', 



Ann. ^^ Mag. N. Hist. Ser. 2. Vol. xvii. 32 



