364 



rather broad and obliquely truncated at the tip, basal lobe triangular, with 

 numerous ciliated bristles, palp normally developed. Second pair of maxillae 

 with both lobes short and broad, the outer one being the larger and obliquely 

 truncated at the tip. Maxillipeds with the basal and masticatoiy lobes well 

 developed, the latter rounded oval in form and edged at the tip with strong 

 curved setse successively transformed inwards to slender spines, inner edge 

 "sharpened and finely serrated, palp not very large, dactylus unguiform. 

 Griiathopoda rather small, and almost exactly of same structure, imperfectly 

 subcheliform, palm of the propodos very short and not defined below by any 

 distinct angle. Pereiopoda comparatively slender, basal joint of the 3rd pair 

 rather narrow, last pair somewhat shorter than the penultimate one and 

 having the basal joint more expanded. Uropoda with the rami lanceolate 

 and edged with very small spinules, last pair differing from the preceding 

 pairs by the short basal part and the more foliaceous character of the rami. 

 Telson rounded quadrangular in form, tip slightly insinuated. 



Remarks. - This genus was established by Costa in the year 1851 

 to include a Mediterranean form, E. tricrislata, which is considered by Boeck 

 to be identical with E. cornigera of Fabricius, to be described in the sequel. 

 The genus is chiefly characterised by the peculiar form of the 4th and 5th 

 pairs of coxal plates, which give the species a most strange appearance. It 

 comprises 4 Norwegian species, one of which is now for the first time estab- 

 lished, while another form has formerly been confounded with E. cornigera. 



1. Epimeria cornigera (Fabr). 



(PI 128). 



conii'/cr, Fubricius, Reise nach Norwegen, p. 83. 

 Syn.: Yerturnnus Crancliii, White. 

 Acanthonotus Cranchii, White. 

 Acanthonotns testudo, White. 

 Kpimeria tricristata, Costa. 

 Acanthonotus Oweui, Sp, Bate. 



Body much inflated, with the anterior part of the back broadly vaulted, 

 posterior part distinctly carinated, the carina beginning at the antepenultimate 

 segment of mesosome and forming, in this and the 4 succeeding segments, laminar, 

 posteriorly pointing projections, acute at the tip ; 1st segment of urosome likewise 

 carinated in its posterior part, and produced to an acute projection, in front 

 of which there is a small, saddle-like impression. Last segment of mesosome 

 and those of metasome having, moreover, on each side, a subdorsal keel, termi- 

 nal ing in ea<-h segment, except the last, in a small tooth-like projection. 



