1922.] 



W. M. Tattersaix : Indian Mvsidacea. 



493 



h 



show that it cannot be referred to the Mysini, and that the exo- 

 pod [endopod] of the fifth pair being twice as long as the endopod 

 [exopod] is somewhat ano- 

 malous." There is some- 

 thing inconsistent in both 

 these statements and Han- 

 sen appears to have got his 

 terms exopod and endopod 

 mixed. I have given in 

 square brackets the term 

 which I think the author 

 intended. At any rate, my 

 interpretation is supported 

 by Hansen himself earlier 

 in the same paper (p. 13) 

 where, when emphasising 

 the supposed anomalous con- 

 dition of the male pleopods, 

 he states that Lycomysis 

 differs from all hitherto 

 known genera " in having 

 the endopod of the poste- 

 rior pairs of pleopods longer 

 than the exopod and the en- 

 dopod of the fifth pair 

 longer than that of the 

 fourth." 



From these quotations it 

 is clear, I think, that Han- 

 sen regarded the pleopods 

 of the male of Lycomysis as 

 biramous, and that, in con- 

 sequence, it could not be 

 referred to the tribe Mysini. 



Colosi (1916) gives a new 

 diagnosis of L. spinicauda 

 based on a male specimen 

 from the China Sea. He 

 describes the pleopods of the 

 male in the genus as follows 

 " Primo, secondo, terzo e 

 quinto pajo con endopodite 

 ed esopodite rudimentali ; 

 quarto pajo con pedunculo piu lungo che largo, endopodite rudimen- 

 taleed esopodite lunghissimo cotnpostoditre articoli,di cui il primo 

 piu lungo degli altri, e terminato da due filamenti (spiniformi ?)." 

 In the diagnosis of the species Colosi gives slightly fuller details 

 especially of the fourth pair of pleopods, from an adult male, which 

 have the exopod greatly elongated, three-jointed, the third joint 

 bearing two terminal filaments. Colosi figures the fourth pair of 



Text-fig. 25. 



—Lycomysis spinicauda, 

 Hansen. 



a, third pleopod of male, X 100 ; b, fourth 

 pleopod of male, X 100; c, fifth pleopod of 

 male, X 100. 



