— 3i — 



long as the exopods, and he is of the opinion that thèse diffé- 

 rences must be valid characters between S. longicorne, Sars, 

 and S. mastigophorum, Chun. Doubtingthis conclusion I applied 

 myself to Dr. Caïman, asking him to settle the question forme ; 

 in a letter he tells me that he measured the appendages in 

 question « of the type-specimen [of Sars] with a micrometer 

 a and though it is not possible to get accurate measurements 

 « as the bases of the limbs are indistinct the approximation 

 « is near enough to Chun's figures. I make the endopod of 

 « i st pair i 1/2 times the exopod and that of the 2 nd pair 

 « 21/2 times the exopod. » The figure given by Sars of 

 S. longicorne is therefore incorrect in thèse respects, with the 

 resuit that S. mastigophorum, Chun, must be cancelled as being 

 identical with the species of Sars. 



18. Stylocheiron elongatum, G. O. Sars 



Stjlocheiron elongatum, G. O. Sars, op. cit. p. 146, Pl. xxvn, 

 figs. 6-10. 



Localities. — Stat. 1736, 3 spécimens; stat 1749, 1 spé- 

 cimen; stat. 1760, 3 spécimens; stat. 1768, 1 spécimen; stat. 

 1802, 10 spécimens; stat. 1849, 2 spécimens; stat. 1 856, 

 4 spécimens. 



19. Stylocheiron abbreviatum, G. O. Sars. 



Stylocheiron abbreviatum, G. O. Sars, op. cit. p. 147, Pl. xxvn, 

 figs. 1 1 - 1 3 [Very young spécimens]. 



Stylocheiron chelifer, Chun, op. cit. p. 162, Pl. xi [Subadult 

 maie]. 



Localities. — Stat. 1736, 1 spécimen; stat. 1760, 1 spé- 

 cimen ; stat. 1768, 3 spécimens ; stat. 1800, 1 spécimen ; 

 stat. 1844, 1 spécimen ; stat. 1 856, 6 spécimens. 



Remarks. — The thirteen spécimens enumerated differ very 

 much in size. Two of them, measuring only 5 or 6 mm in length, 

 agrée well with Sars' figure of S. abbreviatum ; some large 

 spécimens, viz. one adult maie and some probably adult females, 



<30) 



