i i;i,sii-\v LTEH 01 'OLOPJ D Q LNT) <\i,vniim. 28 



species o£ Cyclops wit 1 1 elr\ en- jointed antenme, Seeing thai 

 I lie possession of licit number of joints is eh:i raeterisl ie of one 



e in the development of the seventeen -join tod forum, [hit 

 we have, in this case, the swimming feet all perfectly developed 

 and three- join ted, and no examples of any seventeen jointed 

 forms were found in the gathering. For the present, therefore, 

 I must l<»ok upon C. Ewarli iw being a pood species. The figure 

 of the entire animal, given in the Kinliory Hoard Itoport, is not 

 quite satisfactory, and I reget that I am unable here to give a 

 better one, qo specimens having been preserved In a fit condition 



for that purpose 



16, Cyclops longicaudatus, Poggenpo] (PI. x., figs. 6 7). 



1874. Cyclops longicaudatus, Poggenpo] (26), p. 72, pi. XV., 

 ags. 19 21 ; pi. XVI., ags. - r > 6. 



Female. Body widest in front; tapering gradually and evenly 



to the fure:i ; no distinct separation between thorax and abdo 



men. First cephalothoracic segment almost circular; a distinct 

 consi rid ion between it and the following segment, tlio sides 

 of which are somewhat produced backwurdn, forming angular 

 cusps; third segment constricted in front, lateral margins protu- 

 berant, rounded, not at .-ill angulated j fourth segment somewhat 



narrower, constricted in front, but produced behind ho BS to 



form angulated, alssform lateral processes; last thoracic scarcely 



wider than the first abdorr.inal segment, constricted in front, 

 lateral margins rounded; first abdominal segment quite as long 



as the following three, tapering backwards, constricted in front; 



caudal rami about four times as long as broad ; equal in length 



to the two preceding segments; caudal seta- short, delicately 



plumose; innermost of the two median sela- more th.in half 

 as long as the abdomen, and only slightly longer than the ne\l 

 ( outer) seta ; bases of these two seta: dilated ; the two secondary 

 apical sel;e are very short, I, lie outer, however, distinctly longer 

 than the inner ; the lateral SetSS are situaled at about the middle 

 Of the outer margins of the rami and reach nearly to the apices. 

 The abdomen, altogether, including the furca,, is more than 

 half as long as the cephalotliorax . Anterior antenna- eleven 



88 



