400 A HISTORY OF BECENT CRUSTACEA 



T^rythrops micropMlmlma^ Sars. Eggs few and large. 

 Upon this species Giard and Bonnier have found a para- 

 sitic Copepod, which thus retaliates upon the Isopods that 

 are parasitic on Copepoda. 



Notophrijxus^ Sars, 1882. The animals are attached to 

 the back (or side) of the host. In the female the body is 

 symmetrical, a little depressed, imperfectly segmented, 

 the first antennae are laminar, the five pairs of feet are 

 small, incompletely articulated, and crowded into a narrow 

 space on either side of the mouth. The pleon is without 

 appendages. The male has the pergeon clearly segmented, 

 with the full number of appendages, the pleon unseg- 

 mented, without appendages. 



Notnphryxus ovoides, Sars, 1882, on Amhhjnpsis ahhre- 

 viata, Sars. 



Notojjhryxus clyjieahis, Sars (1880), on Pseudomma 

 roseum, Sars. 



Notopkrijxus lateralis^ Sars, on Neiiiatos cells inerjalopts, 

 Sars. This is thought likely to become the type of a new 

 genus. 



Notophryxus glohidaris, Sars, 1885, on Thysaiioessa gre- 

 garia, Sars. 



Heteropliryxus^ Sars, 1885. The animals are attached 

 to the back of the host. The female has the back pretty 

 distinctly segmented, the five pairs of feet distant from 

 one another, and the fifth pair remote from the rest, di- 

 rected backwards, bifurcate ; the pleon rudimentary, with 

 the male adhering to this rudiment. 



Reieropliryonis appeiidicidatiis^ Sars, 188b, on Eup^hansia 

 peUucidcCj Dana. 



Fainily 4 . — Ccdi iropsidoe . 



They are parasitic on Isopoda and Amphipoda. 



Oft^irop-s, Kossmann, 1884<, for Ccdjira, Kossmann, 1872, 

 preoccupied, is described as having ' 8-9 distinct segments, 

 divided by a chitinous lamella into dorsal and ventral 

 halves ; mouth in the ventral part of the first segment ; 

 pouch-like appendages of the single segments filled with 

 embryos ' (' Zool. Record,' 1872). 



