1 882.] and Adjacent Waters. 



NEW GENERA AND SPECIES OF COPEPODA. 



(Plate VIII Figs. 24, 28 and 29; Plate ix Figs. 1, 2, 4, 5, 7 and 9.) 

 'his genus is similar to Diaptomus in general appearance, but differs especially 

 structure of the filth pair of legs of male and female, 

 'he antennae are 23-jointed, the right of the male geniculate between the 18th a 



'he antennules and mouth-parts have the same general structure as in Diaptom 

 the former are unusually large. The legs of the first pair have both rami 

 ted. In the male both legs of the fifth pair are bi-ramose and armed with p 

 e cilia (PL vm Fig. 29). The inner ramus of each is 3-jointedand unmodifi. 

 he outer ramus of the left leg the second and third joints are consolidated, a 

 r three plumose terminal seta-, a -In mi- -pine on the outer margin and a pub 

 : tubercle at the inner base. The outer ramus of the right kg is 3-jointed, be; 



female. The •antenna' scarcely surpass the cephalothorax, and are very richly sup- 

 plied with olfactory clubs. The second j >int is nearly as long as the three following. 



