THE AXNA.LS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SEVENTH SERIES.] 

 No. 33. SEPTEMBER 1900. 



XXXIV. — On some Malacostracous Crustaceans from Ma- 

 laysia in the Collection of the Sarawak Museum. By 

 W. F. LA.NCHESTER, M.A., King's College, Cambridge. 



[Plate XII.] 



The Crustaceans with which I deal in this paper were sent 

 to me by Mr. R. Shelford, B.A., Curator of the Sarawak 

 Museum, when I was at Singapore in the early part of 1899, 

 and I am greatly indebted to him for giving me the oppor- 

 tunity of identifying them. He has, further, been kind 

 enough to let me retain all but two of the specimens, and 

 those that may be desiderata to the Natural History Museum 

 at South Kensington will be deposited there. It is a small 

 collection of 38 species (27 genera), and only one of these is 

 new ; but some, in particular the Potamons, of which there 

 are five species, have only been recently described. This 

 Potamon group, which seems to be especially well represented 

 in Borneo, and which ranges there from sea-level to 6000 feet, 

 numbers many species of more or less definiteness, and 

 greater additions to our collections will no doubt enable us 

 to reduce the number of these somewhat and at the same 

 time to get a clearer idea of their mutual affinities. There is 

 also a specimen of a Callianassa, unfortunately somewhat 

 damaged, but almost certainly identical with C. Martensi, 

 Ann. & Mag. N. Hist. Ser. 7. Vol. vi. 17 



