470 PROCEEDINGS OF THE NATIONAL MUSEUM. vocxxxv. 



and divided at the tip into three parts — a ventral, a dorsal, and a 

 lateral, the latter on the inner side. The ventral part is in the form 

 of a two-jointed cylindrical process, the terminal joint much smaller 

 than the basal. The dorsal part is a large flattened claw, armed on 

 its concave margin with two small spines. The lateral part is a 

 founded knob covered with short spines. The mandibles have five 

 coarse teeth on the inner margin at the tip: the maxillae arc narrow 

 and unsegmented, with a protuberance on the inner margin at the 

 center, and three small spines at the tip, the outer one much smaller 

 than the other two. 



The first maxillipeds are attached close to the mouth tube, and con- 

 sist of a swollen basal joint and a short but stout terminal claw. The 

 latter is only one-third the length of the basal joint and is straight 

 except at the tip, where it curves slightly. 



Total length. 6.2 mm. Length of genital portion, 4 mm.; of egg- 

 strings. S mm. Width of genital portion, 4 mm. 



Color. — Body a uniform yellow, deeper at the center of the genital 

 segment over the ovaries. Attachment bulla a deep brownish, black. 

 Egg strings light yellow in early development, becoming later a dark 

 orange. 



(gibber, hunchbacked.) 



This species may be distinguished by the large hump on the back 

 between the bases of the second maxillipeds, by the wide and strongly 

 flattened genital portion, and the fact that the first maxillipeds an- 

 between the bases of the second pair and yet close behind the mouth 



tube. 



There is a second lot of five females, taken also from the gill arches 

 of Salvelinus malma at Bering Island by Governor N. Grebnitzky, 

 and are Cat. No. 38591, U.S.N.M. 



LERN^OPODA BEANI. new species. 



Plate LXXXI. 



Host a ml rccon! of specimens. — A lot of twenty-five specimens, ail 

 females, were taken from the gill filaments of the Quinnat salmon, 

 Oncorhynchus tschawytscha, captured in the McCloud River, Califor- 

 nia. August -I, L881. These are taken as the types of the new species 

 and are Cat. No. 29086, U.S.N.M. 



There are also two other lots obtained by the l T . S. Bureau of Fish- 

 eries from the same host, but in Battle Creek, Colorado. The first 

 of these is Cat. No. 38584 and the other Cat. No. 38585, U.S.N.M. 



A fourth loi was obtained by Dr. C. II. Gilbert from the rainbow 

 trout, Sal mo n-'nli us. at a lish hatchery located at Sisson, California: 

 Cat. No. 38605, U.S.N.M. 



Female. Body not much flattened; head often in line with the 

 genital portion and never much inclined to it. Head, including the 



