296 MR WALTER E. COLLINGE ON THE 



collection are now set forth, together with a list of the species of slugs which have 

 been recorded from Borneo. 



I need scarcely say how deeply indebted I am to the great kindness of Mr Pon- 

 sonby, and to the generous spirit shown by Mr R. Shelford and the authorities of the 

 Sarawak Museum. My thanks are also tendered to Mr Edgar A. Smith, of the British 

 Museum, for the many facilities he has given me for examining specimens in the 

 collections under his charge. Finally, I wish to express my thanks to the Council of the 

 Birmingham Natural History and Philosophical Society for defraying the expenses 

 connected with the drawing of the accompanying figures. 



II. The Bornean Slug-fauna. 



It seems surprising that the Slug-fauna of Borneo has hitherto received so little 

 attention. An island known to possess so rich a molluscan fauna, so far as the shelled 

 forms are concerned, could not fail, one would think, to exhibit a wealth and variety of 

 slug-like species. It does not, however, of necessity follow that the one always 

 accompanies the other, at least so far as our present knowledge goes ; but this possibly 

 may be due to the fact that very little serious collecting has been undertaken for those 

 forms in which the shell is either absent or inconspicuous. As a case in point, I may 

 instance the Indian and Chinese faunas. In the former region a very rich fauna of 

 land-molluscs had been described long before any number of slugs were known. Up to 

 the present time upwards of forty species are known, and I have collections in my 

 possession, awaiting investigation, in which there are at least another eight or nine new 

 species. An equally rich fauna of land-molluscs is found in China, but up to the 

 present only about a dozen species of slugs are known from that region. 



One would presuppose, from the natural conditions of this island, that very many 

 slug-like genera would be preesnt, and more careful investigation in Sarawak and the 

 remainder of the island will, I am inclined to think, reveal a series of such of unusual 

 interest. 



Issel (6), in 1874, in his well-known work, recorded six species, viz. : — 



Veronicella liasselti, v. Marts. 

 Veronicella bleekeri, Kerfst. 

 Veronicella wallarei, Issel. 



Parmarion becarii, Issel. 

 Parmarion clorice, Issel. 

 Damayantia dilecta, Issel. 



It is open to question if the two species placed in the genus Parmarion are rightly 

 assigned. Cockerell (l) has placed the P. becarii in the genus lbycus, Heynemann, 

 with the P. dories as a variety. From Issel's figures (6, T. iv. figs. 7-11), I am 

 inclined to think that they both belong to the genus Wiegmannia. Nothing, however, 

 being known of the internal structure of these forms, it is exceedingly difficult to say, 

 with any certainty, what they are. Possibly the genus Parmarion, sens, str., does 

 not occur in Borneo ; certainly nothing yet has been described from this region which 



