Copepoda from the Falkland Islands. 5 



inner ramus is furnished with two sctse on the inner margin^ 

 one on the outer, and three on the rounded apex. 



Male. — The right leg of the fifth pair of thoracic feet in 

 the male is rather shorter than the left, the proximal joint of 

 the outer ramus is tolerably expanded, but the terminal 

 portion is very narrow, twisted, and claw -like, and is articu- 

 lated on the inner aspect of the proximal joint, as shown in 

 the figure (fig. 1) ; the inner ramus is three-joinicd, the first 

 joint is moderately stout, but the other two are slender, and 

 the last one ends in one or two spiniform setie ; the left leg 

 is tolerably slender and elongated^ and the inner ramus is 

 very rudimentary (fig. 1). 



Length of the female about 2 mm., the male being rather 

 smaller. The length, however, varies to some extent in 

 different specimens. 



Dr. Mrazek records the examination of specimens of this 

 form sent from South Patagonia, and identifies the species 

 with Centropages brevicaudatus, Brady, from Kerguelen 

 Island * ; but, as Dr. Brady had not seen the male of the 

 species he describes, and as some of the more important 

 specific characters are derived from the male, there appears 

 to be some doubt as to whether the two species are iden- 

 tical. Dr. Ekman subsequently obtained specimens of the 

 same species, but not having at the time seen Mrazek's 

 description, he described them as new under the name 

 Bueclcella vexillifera-\ ; this he afterwards changed to 

 " Pseudoboeckella brevicuudata (Mrazek), var. vexillifera, 

 Ekman ^^ |. I find, on comparing the description and figures 

 of Dr. Ekman Avith those by Mrazek, that there does not 

 appear to be any material difference between them ; I have 

 therefore ascribed the species to Mrazek, but should Mrazek's 

 identification be found correct, his name will be replaced by 

 that of Dr. Brady. 



Pseudoboeckella vallentini, sp. n. (PI. I. figs. 2,8, 11.) 



Female. — The female of this species has a general resem- 

 blance to that oi Pseudubueckella poppei, but is considerably 

 smaller. The cephalothorax is tolerably robust and some- 

 what dilated in front, but tapers slightly towards the poste- 

 rior end ; the lateral expansions of the last thoracic segment 



* " Magalkaensische Sammelreise," Siisswasser-Copepoden, p. 8, figs. 6, 

 7, 12, 21, 26, 27, 29, 45, 46, 50, and 52 (1901). 



t ' Wissenschaftliche ergebnisse iler Scliwodischen Siidpolar-expe- 

 dition l'.X)l-;^,' Band v. Lief. 4, Cladocera ii, Copepoda, p. 10, Tat', i. 

 fijr^. 7-12 (1905). 



'\ Zo<j1. Anz. 15. xxi.x. no. 19. p. 601 (Dec. I'.'OOj. 



