30 BRITISH COPEPODA. 



[Genus CYLINDROPSYLLUS, nov. gen. 



Animal cylindrical, much elongated ; head united 

 with the thorax and having a sharp rostrum ; abdomen 

 4-jointed, as wide as the thorax, and not distinctly 

 separated from it. Anterior antennas short, 5-jointed ; 

 posterior 2-jointed, destitute of a secondary branch. 

 Posterior (?) foot-jaw small, provided with an apical 

 curved spine and several marginal setas (rest of the 

 mouth-organs unknown). First four pairs of swim- 

 ming-feet having the outer branch B-, the inner 2- 

 jointed; branches of the first pair very short and 

 nearly equal ; inner branch of the second, third, 

 and fourth pairs very short ; fifth pair rudimentary, 

 1 -jointed, foliaceous. 



In the Table of Classification (vol. i, p. 31) this 

 genus is given as Cylindrosoma ; which name, however, 

 being already in use, is here altered to Cylindropsyllus. 

 Though given in the table amongst Harpacticidse, it 

 more probably belongs to the Pcscilostoma. For the 

 present I content myself simply with a description of 

 the species, without attempting to assign it to any 

 recognised family. 



1. CYLINDROPSYLLUS LMVIS, nov. sp. PI. LXXXIV, figs. 



18. 



Animal of equal width throughout, the abdomen 

 being as wide as the cephalothorax and not separated 

 from it by any constriction; first body-segments as 



