DR. W. T. CALMAN ON A GENUS OF THE SERGESTID.E. 219^ 



On Aphareocaris, noni. nov. {Aphareus, Paulson)^ a Genus o£ the Crustacean 

 Family Sergesticla?. By A¥. T. Galman, D.Sc, F.L.S.* 



(Plate 16.) 



[Read 19th June, 1913.] 



The genus AjyJuireus was established by Paulson in 1875, for a species which, 

 he desci'ibed from a single specimen taken in the Red Sea. He placed it in 

 the family Penseidse, but did not further discuss its affinities. No further 

 specimens appear to have been recorded^ and, so far as I am aware, the 

 genus has only been mentioned twice by later writers. Mr. Stebbing, in 

 1893, gave a definition of the genus^ derived from Paulson^s account, but 

 transferred it to the tribe Stenopidea; Nobili, in 1906, gave a translation f 

 of Paulson^s description, reproduced some of his figures,, and suggested that 

 the proper place of the genus was in the family Sergestidpe. 



Among a small collection of Crustacea from Thursday Island, Torres 

 Straits, recently presented to the British Museum by Dr. J. R. Tosh, is 

 a specimen of what I regard as a second species of the genus. It is a male, 

 adult or nearly so, and was quite perfect ; in view of the divergent opinions 

 expressed as to the affinities of the genus, it seems worth while to give 

 a somewhat detailed account of it. 



Unfortunately^ the name AjjliareKs is preoccupied for a genus of fishes, 

 and it is therefore necessary to propose a new name for the Crustacean 

 genus. 



Geaus AphaeeocakiSj nom. nov. 

 Aphareus, Paulson, Izslyedovaniya Ilakoobraznuikh Krasnagho Morya.. 



Chast I. Kiev^ 1875, p. 117 ; Stebbing, History of Crustacea (Internat. 



Sci. Ser.), 1893, p. 212 ; ^Nobili, Ann. Sci. Nat. ser. 9, Zool. iv. 1906, 



p. 21 ; nee Aphareus, Cuvier et Valenciennes, Hist. Nat. Poissons, vi.. 



1830, p. 185. 

 Genotype. — Aphareus inermis, Paulson, op. cit. p. 117, pi. xviii. figs. 3-3 k. 



Aphareocaris elegans, sp. nov. 

 Description of male, — Total length 20 mm. (PI. 16. figs. 1-16.) 

 Body slender and compressed. Carapace just over one-fourth of total 

 length, with a very short acute rostrum continued backwards as a short 

 dorsal crest cut into two teeth ; with a supra-orbital and a hepatic spine, the 



* Published by permission of the Trustees of the British Museum. 



t I am much indebted to Dr. K. Andersen for a fresh translation of the passages in 

 Paulson's Russian memoir. The additions to Nobili's version are, however, imimportaut,, 

 and no light is thrown on the obscurities to which he calls attention. 



