64 

 7. ^Ega ventrosa, M. Sars. 



(PL XXVI, fig. 3.) 

 JEya, ventrosa, M. Sars, Chr. Vid. Selsk. Forh. 1848, p. 156. 



Syn: jEga Loveni, Bovallius. 

 JEgioclms ventrosus, Bov. 

 NordensJcyoldi, Bov. 



Specific Characters. Body rather broad, oval in form, with the dorsal 

 face slightly vaulted and quite smooth. Cephalon of moderate size, with the front, 

 as usual, slightly produced in the middle. Coxal plates of usual structure. Meta- 

 some exceeding half the length of the mesosome, epimera acutely produced; ter- 

 minal segment subtriangular, produced at the tip to an obtuse point, dorsal face 

 plain, outer part of the edges distinctly serrated, and armed with minute spinules. 

 Eyes rather narrow, separated in the middle by a distinct interspace. Antennae 

 very slender, resembling those in ^E. arctica, though the flagellum of the superior 

 ones is somewhat longer. Anterior pairs of legs with the inner edge of the meral 

 joint sinuated, and only armed with scattered small denticles. Uropoda with both 

 plates distinctly serrate and denticulate, the inner one broader than the outer, 

 and having a very slight emargination outside the tip. .Colour pale yellowish, 

 sometimes with a tinge of chestnut. Length of adult animal 23 mm. 



Remarks. I fully agree with Dr. Hansen in believing the 3 forms re- 

 corded by Dr. Bovallius as JEga Lore'ni, ^-Egiochus Nordenskjoldi and jEgiqchus 

 ventrosus, to belong to one and the same species. The genus sEyiochus cannot 

 be maintained, as, according to Dr. Hansen, it is only founded upon a spurious 

 character, caused by an imperfect exuviation of some specimens. The differences 

 pointed out by Dr. Bovallius between the 3 forms, appear, on the whole, to be 

 quite insufficient as specific distinctions. The present species, first described by 

 my late father, agrees with ;E. arctu-a in the structure of the antenna?, but is of 

 rather inferior size, and, moreover, has the body comparatively broader, the eyes 

 much narrower, and the terminal segment of the metasome of rather a differ- 

 ent shape. 



Occurrence. The species would seem to occur not infrequently along the 

 whole Norwegian coast, from the Christiania Fjord to Komag Fjord in West Fin- 

 mark. As far as I know, all the specimens secured have been taken by the aid 

 of the dredge from rather considerable d<$pths descending to 300 fathoms. It may, 

 however, be assumed that, like the other species, it at times infests fishes of one 

 kind or another. 



Distribution. Coast of Bohuslan (Bovallius), Greenland (Bovallius). 



