-<V 



109 







Gen. 17. Iliocypreila, Daday, 1900. 



Generic Characters. Shell resembling in shape that in the preceding 

 genus, though as a rule somewhat more elongate and compressed. Valves 

 with the 2 vertical folds in front of the middle well marked, but without any 

 lateral projections, surface roughly granulated as in Ilyocypris. Antennae not 

 adapted for swimming, the setae in both pairs being rather short and not 

 ciliated. Anterior legs with the terminal part distinctly 4-articulate, the penul- 

 timate joint being sharply divided in the middle. Structure of the remaining 

 appendages not essentially different from that in Ilyocypris. 



Remarks. This genus was proposed in the year 1900 by Daday, to 

 include the form recorded by Vavra as Ilyocypris gibba var. repens, and was 

 chiefly characterised by the rudimentary condition of the natatory setae on the 

 posterior antennae, rendering the animal quite uncapable to move freely in the 

 water. Another well-marked difference from Ilyocypris is found in the distinct 

 subdivision of the penultimate joint of the anterior legs. As generally a 

 generic value has been assigned to both these characters, I think that the 

 genus ought to be supported, though in other respects approaching closely to 

 Ilyocypris. In addition to the species observed by Daday and described below 

 2 other forms recorded by Kaufmann as Ilyocypris inermis and /. iners are 

 apparently referable to this genus. 



37. Iliocypreila Bradyi, G. O. Sars. 



(Pi. L, fig. 2). 



Ilyocypris Bradyi, G. O. Sars, Oversigt af Norges Crustaceer II, p. 59. 

 Syn: Ilyocypris gibba var. repens, Vavra. 

 Iliocypreila repens, Daday. 



Specific Characters. Female. Shell rather compressed, seen laterally, 

 oblong quadrangular in shape, greatest height in front and scarcely exceeding 

 half the length, dorsal margin perfectly straight and nearly horizontal, being 

 only little prominent in the ocular region, ventral margin deeply sinuated, 

 anterior extremity well rounded off, posterior obtusely blunted: seen dorsally, 

 narrow oblong in outline, the greatest width scarcely exceeding 2 /o of the 

 length, anterior extremity more pointed than the posterior. Valves with the 

 inner duplicatures very sharply defined and rather broad, borders in front and 

 behind finely denticulated. Anterior antennae with the terminal part scarcely 

 as long as the basal one, none of the setae exceeding this part in length. 



