NO. 20G3. NORTH AMERICAN PARASITIC COPEPODf^—WILSOX. 715 



Total length, 2 mm. Greatest diameter, 1 mm. 



{rostrata, furnished with a rostrum or beak.) 



Remarks. — This species is apparently common upon the halibut of 

 the northern Atlantic wherever they are captured. It is sufficiently 

 distinguished by the characteristics given under the genus. Atten- 

 tion is particularly called to the strong contrast between the males 

 of this genus and Bracliiella in their general bodily appearance as 

 well as in the details of the appendages. 



EPIBRACHIELLA, new genus. 



Generic characters of female. — Of medium size (10 mm. long); 

 cephalothorax cylindrical and about the same length as the trunk, 

 separated from the latter by a distinct groove; trunk strongly flattened 

 dorso-ventrally and without pits or grooves; six short and pointed 

 posterior processes, all about the same length; no genital process; 

 egg strings much longer and stouter than the processes. 



First antennae four-jointed, the basal joint much inflated; second 

 antennae biramose and turned down across the frontal margin. 

 Firet maxillae bipartite, the palp with two minute spines; second 

 maxillae of varying length and branched at or near their center. 

 Maxillipeds with a stout basal joint, armed on its inner margin with 

 spines and setae, the terminal claw with an accessory spine and a 

 row of saw teeth. 



Generic characters of male. — Head and body in the same Ihie and 

 separated by a well-defined groove; no dorsal carapace; trunk a 

 little wider than the cephalothorax and distinctly segm.ented, taper- 

 ing posteriorly to two bluntly rounded anal laminae. 



Second maxiUae larger than the maxillipeds, the two attached to 

 the center of the cephalothorax, close behind the other mouth parts; 

 no data with reference to the antennae or maxillae. 



Type. — EpihracMella impudica (BracJdella impudica Nordmann.) 



(EpihracJiiella, kn'c close to, and Bracliiella.) 



Remarks. — At present this genus includes but the smgle species 

 impudica, which was well described and figured by Nordmann in 

 1S32. 



Since then it has been noticed by various other investigators up 

 to 1899 when Bassett-Smith tried to change the species from the 

 genus Bracliiella to Thysanote. In this he was followed by T. and A. 

 Scott (1900, 1902, 1904, and 1913). But if we compare the females 

 we fuid in the present genus a total absence of the fimbriate proc- 

 esses, which are the chief characteristics of Thysanote, a very dif- 

 ferent cephalothorax, and numerous distinctions in the detail of the 

 antennae and mouth parts. The males are even more unlike than 

 the females in the separation of the cephalothorax and trunk and in 

 the segmentation of the latter (see pi. 26, fig. F.). 



