BOHBOPODA. 



Tin- .-ynoiiyniy given here, whereby five supposed <listinc( species of En 

 arc merged into E. supcrba, Dana, is the ramlt of n careful examination of the 

 abundant ami valuable 'Discovery' material, aided by a coinjtarison with the 



'li;tll -II.T,. ,- ' ;,iil ' Southern Cross' types (for which I am greatly indebted to 

 Mr. K \V. I. II. .It), and the small collection from the zoological museum of University 

 ' 'iillc^e. hundee. 



bason* foi !..,-. riem mr brief)] -. < pralimiiMi notia I I 



lie. tion, and the opinions as to the synonymy of this species, as far as they concern 

 /.'//'/'/*/./ nntarctica and E. murrayi, have recently l>een confirmed and adopted by 

 routii'-re (190G) as a result of his examination of the collection of the French 

 Antarctic Expedition. A fuller justification for these opinions is given Mow, together 

 with some notes on the growth changes, and sexual differences. 



Female. This sex has been very well descriU-d under the names E. mwntyi by 

 G. 0. Sara (1885), and E. auttrali* by Hodgson (1902). 



The ' Discovery ' specimens present some slight differences from Sars' description, 

 but the examination of his type specimens proves them to be due to errors on San* 

 jwrt. They may be noted under their separate heads as follows : 



(1) I'l-rttnal fpine. Sars states that this spine is wanting in /.'. murrayi, but the 

 type specimen shows it to le distinct, well-developed and simple, but not visible from 

 the side from which Sars took his drawing All the ' Discovery ' sjH-cimciis show a 

 well -developed simple preanal spine. 



(2) Small />l n n f ftpinf on lite outer ilixtttl Cttrner qftktjlnt jtnnt of the itnteimulur 

 petlunde. This spine is not shown in Sars' figures nor mentioned in his description. 

 It is, however, clearly visible in the type in lateral view, but in dorsal view is quite 

 olwcured by the numerous seta' arming the lm.sal joint of the peduncle, which are well 

 preserved and very opaque. The ' Discovery ' material conforms to the type in 

 possessing this spine well-developed. 



(3) Terminal spine on the outer man/in of the nntennal xctil?. Sars mentions this 

 spine in his description as very small, but docs not figure it It is, in fact, not visible 

 in his type from the dorsal aspect, owing to its being slightly vcutrally dcflexed, and 

 the specimen is so well preserved and rigid, that the pressure necessary to place it 

 dorsal surface uppermost for drawing is not sufficient to straighten out the spine anil 

 render it visible in dorsal view. 



(4) Shape of the epimtral plate of the penultimate segment of the pleon, Sars Ix.lh 

 dMcribes and figures the penultimate epimeral plate as acute and triangular, but in the 

 t\[- and the 'Discovery' material, whereas these plates have substantially the same 

 shape as depicted by Sars, the apex in all is bluntly rounded instead of acutely pointed 



(5) Spinutes on the dorsal surface of the telsoii. Sars figures and describes three 

 pairs in E. murrayi, but, as a matter of fact, the number is subject to variation, nil 

 additional |>air anterior to the three shown by Sars being frequently noticed. In all 



VOL. IV. 



