— 26 — 



which are nearly alike in specimens with or without dorsal 

 process and rather different from those in any other spe- 

 cies. The terminal process of these organs has a sharp 

 protuberance at some distance from the end, and the most 

 terminal, short part is bent considerably or strongly in- 

 wards and acute. The proximal process is interesting ; its 

 distal third is bent abruptly and strongly inwards and 

 widens extremely on the inner, proximal side of this part, 

 while the most terminal part is strongly compressed, for- 

 ming a lamella directed backwards and vertical on the 

 broad expansion mentioned ; seen from behind the whole 

 process forms a kind of hatchet with the handle straight or 

 a little to somewhat curved and the blade increasing 

 extremely in breadth towards the edge, the distal part of 

 which is bent outwards, being vertical on the other part 

 of the blade. — For the variety with a protruding, acute 

 process on third abdominal segment I propose the name 

 armata n. var. 



E. lucens H.J . H., E.frigida n. sp. and E. pacifica n. sp. 

 are closely allied and similar in general aspect. The eyes 

 are large, the rostrum is either a small triangle conside- 

 rably shorter than broad or rudimentary ; the lobe of first 

 antennular joint is a somewhat small, subacute or acute 

 triangular process or, in E. frigida, quite rudimentary ; 

 the dorsal part of the hind margin of the abdominal seg- 

 ments is transverse, straight ; etc. They may be distin- 

 guished from each other by the following diagnoses. 



E. lucens H. J. H. — Rostrum generally a distinct, low 

 triangle considerably broader than long, rarely nearly 

 rudimentary. Lobe from first antennular joint conspi- 

 cuous, triangular, about as broad as long, subacute or 

 acute, but not acuminate, protruding forwards and up- 

 wards ; second antennular joint robust, somewhat short 

 and not longer than the third. Terminal process of the 

 copulatory organs long (Fig. 8), reaching somewhat beyond 

 the median lobe, slender, conspicuously expanded towards 

 the bifurcate end, the inner ramus of which is very much 



