580 " THETIS " SCIENTIFIC RESULTS. 



palm less oblique. The marsupial plates are very large on this 

 limb and on the tirst perseopods. The first and second perseopods 

 have the second joint narrow as in the gnathopods, but still more 

 elongate. In the three following pairs this joint is much 

 expanded, with rounded corners, and the hind margin of the fourth 

 joint is a little produced downwards. The appendages of tlie 

 pleon and telson damaged. Length, about 4 5 mm. 



The species is named in honour of Professor G. O. Sars, whose 

 " Crustacea of Norway " is helpful to students of Crustacea, what- 

 ever part of the world their collections come from. 



Locality. — Off Manning River. A single specimen, female. 



Family LEUCOTHOID^. 



Leucothoidce, Sars, Forh. Selsk. Christiania, No. 18, 1882, p. 27. 

 Leucothoidce, Stebbing, Das Tierreich, xxi., 1906, p. 161. 



In 1907 Mr. A. O. Walker ^ withdrew the genus Seha from 

 this family, establishing for it a separate family Sebidce. 



Genus LEUCOTHOE, Leach. 



LeuGothoe, Leach, Edinb. Encycl., vii., 1814, p. 432. 

 Leucotlioe, Stebbing, Das Tierreich, xxi., 1906, pp. 163, 724. 

 Leucothoe, Chevreux, Bull. Inst. Oceanogr. Monaco, No. 117, 

 1908, p. 11. 



In 1901 Walker added the species L. euryonyx and in 1904 

 L. horneili and L. stegoceras, which ai'e named but not described 

 in '■ Das Tierreich." Chevreux in 1908 instituted the new species 

 L. rostrata. 



LEUCOTHOE COM.VIENSALIS, Haswell. 



Stations 28, 44, 48. 



Leucothoe commensalis, Haswell, Proc. Linn. See. N. S. Wales, iv., 



1880, p. 261, pi. X., fig. 3. 

 Leucothoe commensalis, Stebbing, Das Tierreich, xxi., p. 166. 



It is perhaps only a matter of taste or convenience whether 

 this should be taken as a distinct species or as a variety of L. 

 sjnnicarjm, Abildgaard. In the " Thetis " specimen the hand of 

 the second gnathopod contracts towards the finger hinge much 

 more than in Sars' figure of the European form, and has a stronger 



6 Walker.— Nat. Antarctic Exp. iii., 1907, p. 37. 



