392 Mr. W. H. Benson on new Helicidse. 



A shell was obtained by Mr. Theobald at Thyet Mio, which, in 

 form and sculpture, has a great resemblance to M. Albert 

 Mousson^s IMadura Helix squamulosa — only 4|^ whorls being 

 present, and the aperture imperfect; the narrower umbilicus 

 may be due to the immature state of the Burmese shell. I can- 

 not, therefore, without further information, venture to describe 

 it under the provisional name* communicated by letter to its 

 discoverer. It is here indicated in the hope that it may be 

 deemed worthy of search by future collectors. 



Two other small Helices were met with by Mr. Theobald at 

 Thyet Mio and Phie Than ; and a minute species, with an open 

 umbilicus, at Rangoon. These are in such a defective state as 

 to render them unlit for description, any attempt at which would 

 probably lead to confusion. 



Helix climacterica, nobis. 



Journ. As. Sec. Calcutta, 1836, vol. v. p. 352. 



This species was taken at Teria Ghat, in good condition, by 

 Mr. Theobald. It is covered by an olivaceous epidermis strongly 

 plicate obliquely on the upper side, the folds extending a little 

 way below the keel. My original specimen was decorticate, 



Ejusdem varietas ? nana. 



Testa minora, carina obtusiori, sutura impressa ; anfractibus 7 con- 



vexiusculis, ultimo subtus convexiori. 

 Diam. major 15, minor 14, axis 8 mill. 



A single weathered specimen of this shell has been examined. 

 It may possibly prove to be a distinct but allied species when 

 a series of perfect specimens can be examined ; but I do not con- 

 sider its separation advisable without further information re- 

 specting it. 



On reviewing the shells from the Burmese Territory described 

 in this and former numbers of the ^ Annals,^ it appears that of 

 the genus Helix alone twenty-one new species have been obtained 

 by Mr. Theobald, in addition to four novel forms in a state too 

 imperfect for description, and that two others have been contri- 

 buted by Professor Oldham, making a total of twenty-three de- 



* On further consideration it appears probable that this shell is no- 

 thing more than an immature and decayed specimen of the variety of 

 H. rotatoria^ V. d. Busch, which I formerly noted as occurring lower down 

 the Irawadi, at Akouktoung. There it appears to be associated with a 

 variety of H. tapeina, B., which has been confounded with H. rotatoria by 

 cbservers unacquainted with the typical form. The relations of the Java- 

 nese species with //. squamulosa are very close. 



