8 A. 0. WALKER. 



widening near the middle ; fifth joint half as long again and half as wide as the fourth, 

 its front margin finely serrate. Dactyli as in preceding pairs. • 



Fourth and fifth perseopods : First joint narrower than in the third pair, and 

 the front margin of the fifth smooth. The fourth pair are subegual to the third and 

 about one-fifth longer than the fifth. Dactyli as in preceding pairs. 



First uropods reaching to the end of the third, second a little shorter. 



Third uropods : Peduncles broad, one-third longer than the rami, which are sub- 

 equal, wide at the base, and acutely pointed ; the outer edge of the outer ramus smooth 

 the rest unequally serrate. 



Telson equilaterally triangular, barely reaching the middle of the peduncle of the 

 third uropods. 



This species in the length of the perseopods and the relative proportions of the 

 last three pairs approaches Parathemisto, with which it also agrees in the mouth-organs, 

 but the widely expanded and produced wrist of the first gnathopods does not agree with 

 either G. 0. Sars' or Bovallius's* definition of that genus. 



Length 10mm. 



Hyperoche luetkenides. 



(Plate 1, fig. 2.) 

 Hyperoche lUtkenides, A. 0. Walker, Ann. and Mag. Nat. Hist. XVII. (1906), p. 453. 



Lat. 57° 25' 30" S., long. 151° 43' E. ; one -male, length 12 mm. 



Like Hyperoche liltkeni, Bovallius,f except in the following respects : — In the 

 second pair of perseopods (fourth pair of Bovallius) the hind margins of the fourth and 

 fifth joints are not serrate. In the third pair the fifth joint is curved. 



The telson is triangular, with rounded apex, rather longer than the loidth at the base, 

 and reaching to the middle of the peduncles of the third uropods. 



The mandibular palp has the third joint almost as long as the first and second 

 united as figured by Bovallius for H. liltkeni. In this respect both species diff'er from 

 G. 0. Sars' figure of H. kroyeri, Bov. [//. tauriformis (Sp. Bate and Westwood|)], in 

 which the third joint is shorter than the second. § 



In the first pair of perseopods the hind margin of the fourth joint is prolonged in 

 the form of a strong serrate tooth ; in the second pair the tooth is smaller and not 

 serrate, but the curved portion of the end of the joint between the tooth and the base 

 of the fifth joint is so. 



Hyperiella dilatata. 

 Hypeiiella dilatata, Stebbing. 



Young specimens, abundant at W.Q. from Nov. to July, length 8-9mm. 



* Bovallius, Amphipocla Hyperiidea, Part 2 (1889), p. 129. 



t Bovallius, Amphipocla Hyperiidea, Part 2 (1889), p. 97, PI. VII. 



X British Sessile-eyed Crustacea, Vol. 2, App., p. 519. 



§ Mr. W. M. Tattersall, who has kindly examined specimens of H. tauriformis from the W. of Ireland for 

 me, informs me that the palp in the male resembles Bovallius's figure of H. liltkeni, while that of the female 

 agrees with Sars' figure. 



