62 BRITISH OOPEPODA. 



of Cyclops (?), which I have not been able to identify 

 or describe from want of sufficient material. 



Genus 15. MESOOHEA, Boeck (1864). 



/ 



(Paratachidius, Brady & Robertson, 1873.) 



First pair of antennae 7- or 8 -jointed; inner branch 

 of the second pair small, 1- or 2-jointed. Mandible- 

 palp of one branch. Inner branch of the first pair of 

 feet 2-jointed, the first joint being usually much elon- 

 gated, the second and third coalescent ; outer branch 

 shorter, 3-jointed. Inner branch of the second, third, 

 and fourth pairs 2-jointed, short. 



There is nothing to distinguish Mesoc-hra from the 

 genus Canthocamptus excepting the structure of the 

 swimming-feet, the inner branches of which are con- 

 stantly 2-jointed. 



1. MESOCHEA LILLJEBOEGII, Boeck. PI. XLI, figs. 15 



21 ; and PL XLVII, figs. 

 1621. 



Mesochra Lilljeborgii, Boeck. Oversigt Norges Copepoder, p. 51 



(1864). 

 Paratachidius gracilis, B. & R. Ann. and Mag. Nat. Hist., ser. iv, 



vol. xii, p. 131, pi. viii, figs 816 (1873). 



Rostrum large, longer than the first joint of the 

 anterior antenna ; head united with the first thoracic 

 segment ; first four abdominal rings bordered behind 



