32 ^Ir. A. 0. Walker — JS^otes on Amphipoda. 



in accordance with it (/. c, p. 60, pi. ix. fii?. 1), regardless of 

 Stimpson's statement, " Legs of the 5th pair [i.e. iird perjeo- 

 pods] wanting the expansions of the basal joints." An exam- 

 ination of Bate's type specimens at the British Museum, kindly 

 made by Dr. W. T. Caiman, proves Stimpson to be right. 



(2) Prof. Delia Valle, in his description of S. valida, Dana, 

 in F. Fl. Neapel (Gammarini), p. 567, says that tht fifth and 

 sixth pairs of thoracic legs (third and fourth perasopods) have 

 the squama rather large, thus apparently confirming Dana. 

 But on being asked at my instance, by the good offices of 

 Dr. P. Mayer, if this was correct, he replied that it was a 

 lapsus calami, and ought to have been sixth and seventh pairs, 

 in proof of wliich he kindly sent me, through Dr. Mayer, 

 drawings of the three pairs of perseopods, showing the second 

 joint of the third pair narrow as in the first and second. 



(3) In Rep. Ceylon Pearl Fisheries, vol. ii. p. 262, pi. iii. 

 fig. 19, I described Stenothoe gaUensis, a species differing 

 from aS. valida only in the absence of a distal tooth on the 

 ])alm of the second gnathopod in the female and a peculiarly 

 formed second joint in the ramu3 of the third uropod of the 

 adult male. Unfortunately in describing from a mounted 

 specimen of wliich the limbs were displaced, I mistook, and 

 consequently described and figured, the fourth peraeopod for 

 the third. This was corrected in Trans. Linn. Soc, 2nd ser. 

 Zool. 1909, vol. xii. p. 331. The second joint of the third 

 perseopod is " linear " or narrow-oblong, as in the first and 

 second pairs. 



If the view be accepted that Dana was mistaken in his 

 description of the third perajopod, then to the list of synonyms 

 in the Am])hipoda of ' Das Tierreich ' must be added Stenothoe 

 assimilis, Chevreux, Bull, de I'lnst. Oceanograph. Monaco, 

 1908, Mars. p. 4, figs. 4-6. 



I have examined specimens from the coast of Peru from 

 the U.S. Nat. Museum, Washington, which agree perfectly 

 Avith Dana's description except as regards the third pera^opods, 

 which are linear. 



Genus Hemijassa, A. O. Walker, Nat. Antarct. Exped. 

 vol. iii. p. 38. 



Hemijassa oclus (Sp. Bate). 



Like Jassa, but uiopod 3 not projectitig beyond 1 and 2 

 and having the outer ramus without secondary teeth or curved 

 spines. 



