Xlyll. DESCRIPTION OF AN AGRIOLIM AX 

 FROM GYANTSB, TIBET, COIvLECTED BY 

 CAPTAIN F. H. STEWART, INDIAN MEDI- 

 CAL SERVICE, WITH DETAILS OF ITS 

 ANATOMY. 



By Lieut.-Col. H. H. Godwin-Austen, F.R.S., F.Z.S., etc. 



Some specimens of slugs have lately been placed in my hands 

 by Dr. Nelson Annandale, Superintendent of the Indian Museum, 

 Calcutta, Considerable is the interest attached to them because they 

 were collected by Captain F. H, Stewart, I.M.S.. on the nth Sep- 

 tember, 1907, at Gyantse, in Tibet, at an altitude of 14,500 feet, 

 and are the first slugs to have been obtained in that part of Tibet. 



There were two tubes, one marked No. 88 containing two speci- 

 mens, the largest of the lot, and another, No. 58, twelve specimens 

 much smaller in size of a paler colour : colour, however, in spirit 

 specimens is not of much value, and I can detect no difference in the 

 outward form , nor in the groovings on the body of the large and small 

 specimens, nor in the formula of the radula. The internal anatomy 

 of the two largest was well seen and proves these slugs to belong 

 to the genus Agriolimax, the nearest species being Agriolimax cam- 

 Pesiris var. hypsrborea, as described in the Monograph of the Land 

 and Freshwater Mollusca of the British Isles by Mr. John W. 

 Taylor, p. 135, — a species with a northern habitat in both the Old 

 and New Worlds. As I shall show further on, there are differences 

 between the two, which, considering the very small differences 

 which constitute varieties oi campestris (such as occidentalis , Cooper, 

 of California; montanus^ Ingersoll ; castanea^ IngersoU; intermedius, 

 Cockerell; and tristis, Cockerell, of Colorado) I think render this 

 Tibetan form quite worthy of similar distinction. 



Agriolimax tihetanus, sp. nov. 



Animal 17 mm. in length, pale umber brown in spirit ; the 

 mantle and dorsal surface of foot much darker, nearly black. 

 The mantle is anterior in position and has semi-concentric fold- 

 ings on the hinder part, concentric and given off from the 

 right anterior edge on the fore part; two parallel grooves run 

 down the top of the neck, which are joined on both sides 

 by the main lateral grooves. These last on the side of the 

 animal are very distinctive, deep and well defined ; on the rounded 

 dorsal side of the foot these lateral intervals are first broken up 

 into parallelograms, and then, running closer together, form oblong 



