- 3o - 



E. Valleiitini Stebb. — This species belongs to the 

 next group, as it generally possesses a somewhat short 

 and very thin dorsal process on third abdominal segment. 

 But in some specimens studied by Tattersall (77, p. i3) 

 and in at least one of the numerous specimens seen by me 

 this dorsal process was wanting and did not seem to have 

 existed, to have been broken off. Such specimens bear 

 some resemblance to E. lucens, but are readily distin- 

 guished especially by the shape of the rostrum and the 

 lobe from first antennular joint. The rostrum is a some- 

 what small triangle about as long as broad, thus conspi- 

 cuously narrower, longer and better defined than in 

 E. lucens. The lobe of first antennular joint is very con- 

 spicuous, not triangular, but an anteriorly rather broadly 

 rounded plate more horizontally projecting than the 

 triangular process in E. lucens ; finally the eyes are pro- 

 portionately somewhat larger in E. lucens than m E. Val- 

 lentini. The copulatory organs almost as in E. lucens, 

 but the proximal process a little longer than the terminal 

 (Tattersall, 77, PI. iv, Fig. 10) and the latter with its distal 

 part somewhat aberrant from that in E. lucens. 



The Swedish Antarctic Expedition captured a large 

 number at several stations in an area East of the southern 

 part of South America to South Georgia, and a single 

 specimen so far northwards aslat. 32 1 /4 0 S., long 5o° 14' W. 

 It was known from the Falkland Islands, between New 

 Zealand and Chili, and at lat. 56° 54' S., long. 170° 2& E. 



Group c. Species with a single pair of lateral denticles 

 on the carapace, A protruding, acute dorsal process 

 on third abdominal segment, but iv i thou t any dorsal 

 process — at most with a minute denticle (E. mu- 

 er onat a) — on fourth and fifth abdominal segment. 



This group comprises 8 species already established : 

 E. VallentiniStebb., E. gibbaG.O. S., E.paragibba H.J.H., 

 E. hemigibba H.J. H., E. pseudogibba Ortm., E. Sib ogee 

 H.J. H., E. gibboides Ortm. and E. mucronata G. O. S.; 



