NO. 20fin. NORTH AMERICAN PARASITIC C0PEP0D8— WILSON. 711 



Bernarlcs. — This new species from one of the deep-water fishes may 

 be recognized by its generally plump appearance, by the well defined 

 dorsal carapace of the female, and by the two long and slender ventral 

 processes. The peculiar characters in the male are the short and 

 phnnp body, the small carapace, and the folding of the endopod of the 

 second antennae. 



BRACHIELLA NITIDA, new species. 

 Plate 5G, figs. 246 to 248. 



Host and record of si}ecimens. — A single adult female with egg 

 strings was obtained by the Bureau of Fisheries steamer Albatross 

 from the mouth of Alhatrossia i^edoralis, at station 5015 in the 

 northern Pacific in 1906. The specimen was perfectly preserved and 

 easily determined to be a new species ; it becomes the species type and 

 has received Cat. No. 43584, U.S.N.M. 



Specific characters of /emaZe.—Cephalo thorax slender, flattened 

 dorso-ventraUy, and as long as the trunk; head enlarged and covered 

 with a dorsal carapace; neck grooved in several places as though 

 jointed; trunk a flattened sphere, with a smooth and evenly curved 

 surface; two short posterior processes, close together on the ventral 

 surface, and two-fifths as long as the trunk; egg strings over twice the 

 length of the trunk and stout; eggs in 10 or 12 longitudinal rows, 

 about 45 in the longest rows; no genital process. First antennae 

 three-jointed, the basal joint much enlarged; second antennae bira- 

 mose and turned down squarely across the frontal margin, the exopod 

 two-jointe.d and reaching the tip of the endopod. Mouth tube short 

 and narrow at the tip, not reaching the second antemiao. First 

 maxillae tripartite, the palp short and armed with a single seta. 



Second maxillae slender, longer than the cephalothorax, and sepa- 

 rate for their en the length; bulla small and mushroom-shaped. 



Maxillipeds some distance behind the mouth-tube, rather slender, 

 but standing out prominently from the head, with a short terminal 

 claw, whose inner margin carries a series of minute teeth. 



Color (preserved material), white. 



Cephalothorax, 4 mm. long, 0.5 mm. wide. Trunk, 3.80 mm. long, 

 3.75 mm. wide, 2.5 mm. thick. Egg strmgs, 8 mm. long, 1 mm. in 

 diameter. 



(nitidus, dapper, neat.) 



Male. — Unknown. 



Remarlcs.— This is a peculiarly neat and clean lookmg species and 

 may be recognized by the prominent maxilUpeds, by the long and 

 slender second maxillae, and by the exceptionally long egg strings. 

 In the second antennae also there is a great difference in size between 

 the two rami. 



