1889.] ON A SMALL COLLEKTION OF FEESHW. ENTOMOSTEACA. 9 



elongated, exceeding in length the 2 preceding segments of the 

 tail combined. The bristle of the outer edge is located at the 

 last fourth part of the furca. Of the apical setae the innermost 

 is but very slightly longer than the outmost; the 3rd seta is 

 about twice the length of the furca, but not very much longer 

 than the 2nd. Length 2,80 mm. 



Of this species only a single adult female and a few younger 

 specimens occurred in the collection. 



3. Cyclops sp. 3. 



Very nearly related to the European species C. agilis Koch 

 (= C. serrulatus Fischer). The anterior antennae, as in that 

 species, are 12— articulated and rather narrow, but relatively 

 somewhat shorter than in our species. The furca with its setae 

 has much the same appearance, a series of very minute denticles 

 occurring along the outer edges in front of the small bristle. 

 Length 1,25 mm. 



Only a single adult female specimen with both egg-bags 

 still adhering to the 1st caudal segment was found in the 

 collection. 



4. Cyclops sp. 4. 



Also this form strongly reminds, at least in the form and 

 armature of the tail, of a characteristic European species, viz., 

 0. affinis G. 0. Sars, and it has not been possible for me to 

 detect any essential distinctive feature to separate it specifically. 

 However it may be possible, that it in reality represents a distinct, 

 though very nearly allied species. Length of adult male 1,80 mm. 



Only a few male specimens of this form occurred in the 

 collection. 



Trykt 31te August 1889. 



