NO. 2063. NORTH AMERICAN PARASITIC COPEPODS— WILSON. 603 



proved to be the same that Cuvier had named BracJiieUa thijnni. 

 The former thus becomes a synonym of the latter name. 



LE;R]Sr.A.I?]OFODIlSrA.E;. nev^r svibfaiTiily-. 



Subfamily characters of Femai*^.— Cephalothorax shorter than the 

 arms, and m Ime with the body or bent forward at an angle ; trunk 

 plump, sometimes with, sometimes without, posterior processes, but 

 often showing more or less distinct segmentation; a genital process in 

 some genera but no anal laminae; second maxillae outside of maxilli- 

 peds and the two close behmd the base of the mouth tube; the 

 maxillae united only at the tips, sometimes entirely separate ; bulla, 

 when present, of the ordinary type; egg strings usually short and 

 plump. 



Male. — Cephalothorax separated by a weU-marked groove from the 

 body, which is often segmented; anal laminae present and usually 

 directed backward ; second antemiae biramose and armed with a claw. 



SALMINCOLA, nev/ genus. 



Generic Characters of Female. — Cephalothorax short, stout, and 

 inchned at an angle to the body axis; separated from the trunk by 

 a groove, but with no definite waist; no dorsal carapace; trunk short 

 and stout, often flattened dorso-ventrally, with no signs of seg- 

 mentation; no abdomen, anal laminae, or posterior processes; a small 

 transparent genital process is present in the young female and often 

 in the adult. First antennae indistmctly three-jointed, usually 

 showing no segmentation; second antennae biramose, both rami one- 

 jointed, the endopod larger than the exopod; first maxillae tipped with 

 three spines and without a palp; second maxillae short and stout, 

 joined at the tip by a button or mushroom-shaped bulla, often 

 joined also at the base around the back of the thorax, forming a pair 

 of "shoulders;" maxilhpeds with a stout basal joint and a slender 

 terminal claw; egg strings usually long and slender, eggs small and 

 numerous. 



Generic characters of male. — Size small (0.50 mm.); cephalothorax 

 about the same length as the trunk, the two bent into the form of a 

 semicircle; no dorsal carapace; trunk a little stouter than the ceph- 

 alothorax and indistinctly segmented, with a pair of short anal 

 laminae curved dorsally; no abdomen; first antennae three-jointed; 

 second antennae biramose, the exopod (ventral ramus) uncinate; 

 second maxillae and maxiUipeds each three-jointed, attached to the 

 concave margin of the semicircle at the center, their tips reaching 

 the same level as the tips of the antennae and the anal laminae; 

 maxiUipeds stouter than the second maxillae and attached inside 

 the bases of the latter. 



