^88 MR. G. P. FARUAN ON COPEPODA 



and C. huxleyi of Lubbock. Of the second group, with two 

 setfe on the endopodite of the fourth foot, C luhhocki and 

 G. tenuis have been figured by Giesbrecht ; C anglicus is a well- 

 known species in British waters ; C. amazonicus, C. asiaticus, 

 C. minimus, and C. africanus figure as new species in Dahl's table ; 

 and C erythrceus has been described and figured by Oleve (4). 

 The three new species described below belong to the last group. 



CoRYCiEUS LONGiSTYLis Dana. 



C. longistylis Dana (9). 

 C. variihs Brady (1). 

 C. longistylis Giesbrecht (10). 

 Present in four gatherings, 5 females and 7 males. 

 Both sexes of G. longistylis are easily distinguished from 

 G. lau,tus and G.furcifer, which also have a long furca, by the 

 broad spreading 3rd thoracic segments. The female is not com- 

 pletely figured by Giesbrecht, but Brady's figure of the whole 

 animal (1) (pi. Hi. fig. 1), under the name G. varius, is fairly 

 aecura,te. 



Distribution. Indian Ocean, China Sea, and Tropical Pacific. 



CoRYC^us LAUTUS Dana. 



G. Icmtits Dana (6). 

 G. lautus Dahl (5). 



Present in four gatherings, 12 females and 29 males. 



The female is distinguishable from that of G.ftm-cifer by its 

 larger size, 2'75 mm., G. ftircifer $ measuring only 1-8 mm., 

 and by the form of the abdomen, the anal segment being much 

 wider in front than behind, while in G. furcifer it is only slightly 

 tapered. The male of C. lautus (2* 15 mm.) is consideralbly larger 

 than that of G.furcifer (1'3-1"45 mm.), but otherwise resembles 

 it rather closely in general appearance. The furca, however, is 

 only li times as long as the rest of the abdomen, instead of 

 almost \\ times as in G. furcifer S • 



Both species can be readily distinguished by dissection, G. lautiis 

 having two setse on the endopodite of the fourth foot, while iii 

 G.furcifer there is only one. Dana's (9) figure of G. lautus 2 is 

 easily recognisable as distinct from G.furcifer. 



Distribution. Kingsmill I. (Daoia), N.E. Atlantic. 



OoRYCiEUS ALATUS Gicsbrecht. 



The female of G. alatus is well represented in the collection, 

 36 specimens occurring in five gatherings. The shape of the 

 abdomen, as well figured by Giesbrecht, makes it unmistakable. 

 The males of this species and G.fiaccus present some difficulties. 

 While the females of G. alatus and G.fiaccus number respectively 

 36 and 12, there are 76 specimens of a male which corresponds 

 closely to Giesbrecht's (10) description of G. elooigatus d • These 

 specimens axe undoubtedly the males of G. alatus and G. flaccus, 



