258 MR. R. COLLETT ON BAL^NOPTERA BOREALIS. [Feb. 2, 



from B. sibbaldi ' ; but as it differs in several respects (thus the 

 neck is reduced to a short and quite thin peduncle, from which the 

 body expands rather abruptly to its full size without any gradual 

 transition), I think that the species has not been previously de- 

 scribed, and I propose for it the name E. ruber (figs. E, E'). 



E. ruler has on its proboscis about four rows of very thin, pointed, 

 and quite transparent spines. 



The rostellum, the length of which (including the proboscis) is 2 

 millim., is pointed in front, and has, as a rule, a more or less distinct 

 constriction a little in front of its centre, whence the anterior part 

 narrows regularly towards the proboscis. The robtelhun luis about 



Fig. E'. 



Fiu. E. 



Fig. E. Echinorhi/nchus ruber, sp. uov. (nat. size 25 mm.). 

 E'. Front part, magnified. 



10 rows of spines, the concentric arrangement of which is not 

 always plain. 



The collum is thick anteriorly, and still somewhat narrower 

 than the rostellum, but rapidly narrows off to a thread-like 

 peduncle ; the neck is, however, quite short, and the total length 

 from the rostellum to corpus is only 3 millim., and is thus even 

 shorter than the breadth of the body. 



' ' Monogr. illustr. Baleinoijt cote occ. de Suede ' (Col, Stockliolm, 1807), 



p. 95. 



