CLETODES. 89 



Genus 20. CLETODES, Brady (1872). 



(Cletodes, Brady, Nat. Hist. Trans. Northumberland and Durham, 

 1872 ; Boeck, Nye Slsegter og Arter af Saltvands-Copepoder, 

 1872. Lilljeborgia, Glaus, Die Copepoden-Fauna von Nizza, 

 1866. Orthopsyllus, Brady & Robertson, Ann. and Mag. Nat. 

 Hist., 1873.) 



Animal resembling Laophonte in general appearance; 

 abdomen as broad as the cephalothorax, and not 

 distinctly separated from it. Anterior antenna short, 

 4- to 6- join ted ; secondary branch of posterior antennas 

 1 -jointed, very small, or reduced to a few setaa ; mouth- 

 organs like those of Laophonte. First pair of feet 

 small, non-prehensile ; inner branches of all the four 

 pairs of swimming feet composed of two joints, the 

 first of which is very short. Fifth pair narrow, 

 foliaceous. 



The characters which I formerly supposed to sepa- 

 rate this genus from Lilljeborgia (Glaus), do not, on 

 further examination, hold good. There is mostly, if not 

 always, a small branch attached to the lower antenna ; 

 and the inner branches of the swimming feet, though 

 stated by Glaus, in the generic definition of Lillje- 

 borgia, to be " rudimentary," are yet described in the 

 text as 2-jointed; there is, therefore, scarcely any 

 difference between it and Cletodes. The name Lillje- 

 borgia, however, having been previously used for a 

 genus of Amphipoda, must be discarded, as has already 

 been done by M. Boeck, in favour of Cletodes, the term 

 Orthopsyllus, which, in a previous memoir, was pro- 



