400 A HISTOEY OF RECENT CRUSTACEA 



Erythrops miiyrophthcdma, Sars. Eggs few and large. 

 Upon this species Giard and Bonnier have found a para- 

 sitic Cope pod, which thus retaliates upon the Isopods that 

 are parasitic on Copepoda. 



Notophryxus, 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 antennEe 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 peraeon clearly segmented, 

 with the full number of appendages, the pleon unseg- 

 manted, without appendages. 



Notrphryxus ovoides, Sars, 1882, on Amhlynpsis abbre- 

 viata, Sars. 



Notophryxus dyjieatus, Sars (1880), on Pseudomma 

 roseum, Sars. 



Notophryxus lateralis, Sars, on Nemaioscelis megalops, 

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

 genus. 



Notophryxus glohularis, Sars, 1885, on Thysanoessa gre- 

 garia, Sars. 



Heterophryxus, 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. 



Heterophryxus appendiculatus, Sars, lQQh,oiiEuphausia 

 pellucida, Dana. 



Family 4. — Cabiropsidie. 



They are parasitic on Isopoda and Amphipoda. 



Oafeirops, Kossmann, 1884, for OaWra, 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). 



