X L V. MOLLUSCA, VI. 



By Lt.-Coi.onel H. H. Godwin-Austen, F.R.S, 



(Plates XLV— XLVIII). 



From the malacological point of view this contribution to the 

 Land Molluscan fauna of the Abor country is perhaps the most 

 interesting one as the result of Mr. Stanley Kemp's collecting 

 when attached as naturalist to the punitive force which entered 

 the countr}^ in 1911-12. I much regret the delay in its publica- 

 tion, that expedition having almost become ancient history. So 

 much of what he discovered was preserved in spirit, that the 

 details of anatomy have absorbed much time, and could only be 

 taken up in the intervals of other work. 



This part treats of the slug-like forms and among them it is 

 surprising how many discovered in this far-off corner of Assam and 

 the Eastern Himalaj^a prove to be new. I have taken the opportu- 

 nity of including one species from the Singpho country south of the 

 Brahmaputra. The species are fully figured, and comparison has 

 been made with the genera and species previously known from the 

 mountain ranges on the west. The photographs of the animals 

 have been made by my friend and neighbour Mr. J. S. Gladstone, 

 and I think it can be said are beautifully done, the epidermal 

 detail is shewn to perfection and in a way these creatures have 

 seldom been illustrated before ; much beautiful detail has however 

 been lost in reproduction. I am much indebted to him for the 

 pains and interest he took over the plates, and I am sure all those 

 interested in this group of the MoUusca will feel that they greatly 

 add to the value of the contribution 



There remain to be figured some species of Macrochlamys and 

 Oxytes with Micro-Helices that are very difficult to locate generi- 

 cally. The virgin forests of this part of the world are full of them 

 and they have not yet been properly looked for — they have generally 

 been taken accidentally, often inside the empty shells of the larger 

 species. 



The very large number of species is remarkable, and as a 

 series they differ very much from what has been hitherto collected 

 on the south face of the Eastern Himalayas. This can be partly 

 accounted for by the thorough systematic way Mr. Stanley Kemp 

 worked. His method of searching behind the overlapping leaves 

 of the Plantain may be mentioned, and was quite an original idea. 

 Some of the species he obtained may therefore be looked for in 

 this rather restricted resort, further to the west of the Abor Hills, 

 and also south of the Brahmaputra valley. 



