106 Mr, E. J. Miers 07i Arctic Crustacea. 



body, two-jointed, the basal joint as long as the second, nearly 

 straight, and of the same thickness throughout, with a not very 

 prominent rounded lobe at the distal extremity on the inner side ; 

 this, and the distal half of the inner margin, armed with a series of 

 ten or a dozen small teeth or spines. The second joint is smooth, 

 slightly tapering to its distal extremity and concave on its inner 

 surface. The branchial feet are eleven in number, and the lobes on 

 the inner margin are beautifully fringed with long, close, flexible 

 hairs ; the fifth and sixth pairs are the longest ; and the others de- 

 crease regularly in size. The vesicular body is narrow oblong-oval ; 

 the terminal lobe of the second joint is regularly oval in shape. 

 The caudal appendages lanceolate, small ; margins with slender setae, 

 which become longer as they approach the distal extremity. The 

 specimens are smaller than that collected by Dr. Packard, averaging 

 only 12 miUims. in length. 



Verrill's specimens of this species were from Labrador ; and if, as 

 is thought possible both by Packard and Yerrill, this species be not 

 distinct from the B. groenlandicus and B. color adensis, it must have 

 a very extended geographical range. 



Specimens of B. groenlandicus are mentioned by Packard as having 

 been obtained during the late American expedition of the ' Polaris ' 

 at Polaris Bay, between lat. 81° 20' and 81° 50'. 



copepoda. 

 Lebn-s:opodtd^. 



Lernceopoda arcturi, sp. n. PL IV. fig. 2. 



Coll. Feilden: Floeberg Beach, parasitic on the gills of Salmo 

 arcturus, Gthr. 



On the new charr collected by Capt. Feilden, and recently described 

 by Dr. Giinther, were many specimens of a parasitic Lernaeoid crus- 

 tacean, which I cannot certainly identify with any previously re- 

 corded, and of which the following is a description : — 



The cephalothorax is narrow-ovate, nearly or quite as long as the 

 abdomen, which is ovate, turgid on its dorsal surface, and smooth, 

 there being no trace of articulations or of the tubercles which are 

 so characteristic of Basanistes hucJionis ; the ovaries are about as 

 long as the abdomen. The oral aperture is circular and not pro- 

 minent. The inner antenna? are very small and apparently two- 

 jointed. The outer antennae are stout, broad at base ; the terminal 

 joint is produced on its inner side into an ovate lobe, which is 

 ciliated on the margins, and bears on its outer side a two-jointed 

 accessory appendage, the terminal joint of which is conical and acute ; 

 hence the outer antennaj appear bifid at the extremity ; the palpi 

 at the base of these organs are very small. 



The first pair of maxillipeds arc robust ; the basal portion is stout, 

 and tapers slightly towards the distal extremity, the terminal 

 joint is much slenderer, and bears at its extremity a small ungui- 



