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DESCRIPTION OF A NEW SPECIES OF HELIX FROM BURMAH. 

 By Edgae, a. Smith, F.Z.S., etc. 



Head December \^th, 1894. 



The species about to be described was collected in Burmab by the 

 Rev. W. F. Armstrong, and the unique specimen has been placed in 

 my hands for description by Dr. E. Tulk-Hart, who has also kindly 

 permitted me to retain it for the National Collection. 



It is a very interesting addition to the Burmese fauna and altogether 

 unlike any other form from that part of the world. Indeed, in general 

 contour it more resembles some of the Cubaa species of Caracolus. 



Perhaps Helix trochalia, Benson, from the Andaman Islands, 

 approximates as closely to it as any among the Indian species. The 

 general form of that shell is not unlike, although its umbilicus is 

 much more contracted, and the margins of the peristome are not 

 united by a distinct callus. It is located by Pilsbry as a doubtful 

 species of Papuina, and is placed in a group by itself. " It seems 

 to me (he observes) to be closely allied to H. gahata, Gld., merguiensiSy 

 Phil., etc., species belonging very closely to Trachia, and probably to 

 be included therein rather than in PledotropisJ' 



H. Armstrongi has the form of certain Trochomorphse, but of course 

 differs from that group in having a reflected labrum. 



H. trochalia is located in Trachia by Dr. W. T. Blanford, but it 

 seems to me, upon conchological grounds, to be more nearly allied to 

 Plectotropis. I would therefore propose to leave it and the present 

 species in that group until the study of the soft parts may possibly 

 reveal some other relationship. 



Helix (Plectotropis) Aemstkongi, n.sp. 



Testa depresse conica, in medio acute carinata, late umbilicata, 

 solidiuscula, albida, zona purpureo-rufa latiuscula, spiram adscendente, 

 supra ornata; spira breviter conica, ad apicem obtusa; anfractus 6-6^, 

 lente et regulariter accrescentes, leviter convexiusculi, supra suturam 

 perspicue marginati, costulis confertis obliquis arcuatis et pulchenime 

 granulatis ornati, ultimus infra carinam subserratam convexiusculus, 



