[CEYLON PEART, OYSTER FISHERIES 1906-SUPPLKMENTARY REPORTS, No. XXXIII.] 



REPORT 



ON THE 



LEPTOSTRACA, SCHIZOPODA AND 



STOMATOPODA 



COLLECTED BY 



PROFESSOR HEBDMAN, AT CEYLON, IN 1902. 



BY 



WALTER M. TATTERSALL, B.Sc. 



ASSISTANT NATURALIST (FISHERIES BRANCH) DEPARTMENT OF AGRICULTURE AND 

 TECHNICAL INSTRUCTION FOR IRELAND. 



[WITH THREE PLATES.] 



THE collections of these three groups of Crustacea Malacostraca, made by Professor 

 HERDMAN and Mr. HORNELL in Ceylon, and kindly entrusted to me for examination, 

 are small both in number of species and, with one or two exceptions, in individuals 

 as well. Nor is the number of new forms by any means remarkable or at all out 

 of proportion to the total number of species, only two hitherto undescribed forms, 

 both in the Stomatopoda, having been met with in the collection. Still, the material 

 is not without interest, at least six very rare species being comprised therein ; this 

 afforded an opportunity for completing or adding to the published descriptions, or 

 of increasing materially the known geographical range. 



The LEPTOSTRACA are represented by a single species, which differs so slightly from 

 the well-known and widely distributed northern form, Nebalia bipes, that I cannot 

 consider it as a distinct species or even variety. 



The SCHIZOPODA are on the whole distinctly disappointing. Five species are 

 represented in the collection ; but as three of these occurred only in tow-net 

 gatherings taken on the outward journey to Ceylon, only two can therefore be 

 regarded as belonging to the Ceylon fauna. One of these, Euphausia latifrom, 

 appears to be an abundant form, but of the other, a Mysid, Siriella paulsoni, only 

 a single specimen is present. 



