61 



straight line. Antennae about as in the 2 preceding species. Anterior pairs of 

 legs rather strong, with the meral joint slightly sinuated inside, posterior pairs 

 not much elongated. Uropoda as in JE. tridens. Colour of a young specimen: 

 light yellow, with scattered reddish specks, posterior part of mesosome dark 

 bluish with opaque white pigmentary ramifications in the middle of the segments. 

 Length of adult animal reaching to 48 mm. 



Remarks. — According to prof. Liitken, the form recorded by Strom in his 

 description of Sondmore, as "Fiskebjorn", is undoubtedly referable to this species. 

 The same form was subsequently observed off the British Isles by Johnston, but 

 was only regarded as a variety of his JE. monophthalma. H. Rathke referred 

 the species erroneously to JE 1 . bicarinata Leach, which is a very different species 

 not yet found on the coasts of Norway. Under such circumstances, the name^ 

 JE. Strbmii, proposed by Liitken, ought to be retained for the species. It is easily 

 distinguishable from the 2 preceding species by the very large eyes, which meet 

 along the median line ; and also by the shape of the terminal segment of the metasome. 



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

 whole south and west coasts of Norway, and extends northwards at least to the 

 Lofoten Islands. It is generally found on the skin of the common cod, but, 

 as is the case with several other species, it seems also to infest several other 

 kinds of fishes. I have myself taken it in the Trondhjem Fjord, from the haddock 

 and from the common picked dog-fish (Acanthias). 



Distribution. — British Isles (Johnston), Skagerak (Schodte & Liitken), 

 Faroe Islands (Liitken). 



4. JEga, erenulata, Liitken. 



(PL XXV. fig. 3.) 

 Mga cremdata, Liitken, Vid. Mecld. Nat. For. 1858. p. 70, PI. LA, figs. 4, 5. 



Specific Characters. — Very like the preceding species, but of larger size and 

 coarser structure, the dorsal face being finely scabrous, owing to numerous small, de- 

 pressed pits, and having the transverse lines of the 4 posterior pedigerous segments 

 very distinctly marked. Coxal plates rather large, and less acutely produced poste- 

 riorly. Metasome rather broad, with the epimera of the anterior segments projecting 

 beyond the sides of the mesosome; terminal segment narrowly truncated at the 

 tip, with the posterior edge nearly straight, and distinctly crenulated, upper face 

 plain, without a trace of carinas. Eyes large, meeting above along the median 

 line. Antennae about as in JE. Strbmii. The 3 anterior pairs of legs, on the 

 other hand, distinguished by a very conspicuous cultriform spine, issuing from 



