Tin: ANN VF.S 



MAGAZINE OF NATURAL UIsruUY. 



[SEVENTH SERIES.] 

 No. 33. SKPrEMBKR 1900. 



XXXIV. — On some MaJacostracous Crustaceauft from .]fa- 

 hx'iaia in the CoUection of the Sarawak Museum. By 

 W. F. r.ANCHESTER, M.A., King's College, Cambridge. 



[Plate Xir.] 



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-lev(d to 6000 feet, 

 numbers inany species of more or les.s 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 afTinities. There is 

 also a specimen of a CaUianissa, unfortunately somewhat 

 damaged, but almo.><t certainly identical with C. Martensi, 

 Ann. (0 Mag. N. Hist. Ser. 7. Vol. vi. 17 



