legs are borne in the living animal, these legs being constantly extended laterally 

 to each side of the trunk, without apparently partaking in the movements of the 

 other pairs. 



Distribution. Sweden (Lilljeborg), Germany (Schmeil), Poland (Lande) 

 Turkestan (Uljanin), Central Africa (G. 0. Sars), New Zealand (G. 0. Sars), 

 North America (Herrick). 



32. Cyclops bieolor, G. 0. Sars. 



(PI. XXXIV). 



Cyclops bieolor, G. O. Sars, 1. c., p. 44. 

 Syn.: Cyclops (Raphanus, Rehberg (not Fischer). 



Specific Characters. Female. Body comparatively short and stout, with 

 the anterior division oval in form, greatest width slightly exceeding half the lenght 

 and occurring about in the middle. Last trunk-segment less produced laterally 

 than in C. varicans. Tail rather slender, equalling 2 / 3 of the length of the anterior 

 division ; genital segment only slightly dilated in front and gradually tapered 

 behind, its anterior parts rather protuberant below. Caudal rami about the length 

 of the last 2 segments combined and of linear form, being not at all divergent; 

 seta of outer edge not far from the apex, the 2 middle apical setae remarkably 

 thick and densely covered with cilia, the inner one only slightly longer than the 

 outer and much shorter than the tail; seta of inner corner about twice as long 

 as that of the outer and much thinner. Anterior antennae still shorter than in 

 C. varicans, only slightly exceeding half the length of the cephalic segment, and 

 composed of only 11 joints. Posterior antennae with the last joint considerably 

 longer than the penultimate one. Maxillipeds agreeing in structure with those in 

 C. varicans. Natatory legs, as in that species, with both rami in all the pairs 

 biarticulate; 4th pair rather smaller than the preceeding pairs, and having the rami 

 comparatively narrow, outer apical spine of inner ramus very small and rudimentary, 

 inner spine long and slender. Last pair of legs still more reduced than in 

 C. varicans, its proximal joint wholly coalescent with the segment, distal joint 

 extremely small, without any trace of a lateral spine. Ovisacs of moderate size 

 and carried closely appressed to the tail. Seminal receptacle transversely ellipti- 

 cal in form and almost occupying the whole width of the genital segment. 



Colour rather peculiar, the anterior division of the body being, as a rule, 

 nearly colourless, whereas the whole tail and the anterior antennae exhibit a 

 beautiful golden yellow or orange hue. 



Length of adult female scarcely exceeding 0.60 mm. 



