606 • PROCEEDINGS OF THE NATIONAL MUSEUM. vol.47. 



f ornia, by tho Wilkes Exploring Expedition. Four females were 

 collected by Dr. B. W. Evemiann from the gills of Oncorhynchus 

 nerka at the inlet of Big Payette Lake, Idaho, September 27, 1894. 

 These were identified by G. G. Gurley, and from them he obtained the 

 measurements given below. Unfortunately none of these speci- 

 mens appear in the United States National Museum collection.^ 



Specific characters of female. — Cephalothorax in hne with the trunk 

 axis, triangular in outhne, one-third the length of the trunk, nearly 

 twice as wide as long, with rounded corners. Trunk elliptical, at 

 the center nearly twice as broad as the head, drawn to a rounded 

 point posteriorly between the egg strings. In lateral view both the 

 head and the trunk are flattened into a continuous straight line on 

 the ventral surface, but very convex dorsally. The trunk is thickest 

 anteriorly and the cephalothorai posteriorly, and each tapers lapidly 

 toward the opposite extremity. Egg strings slender, cylindrical, 

 and one-half longer than the trunk; eggs in 8 or 10 longitudinal rows, 

 about 30 in a row. Second maxillae short and stout and much 

 wrinkled, joined to the bulla by a long and slender pedicel; bulla 

 mushroom-shaped, its diameter considerably greater than that of the 

 maxillae themselves ; maxillipeds short and slender. 



2Iale. — Unknown. 



Color (preserved material) , a uniform grayish white. Total length, 

 3.5 mm.; breadth, 2.8 mm.; length of arms, 2.72 mm.; length of 

 buUa pedicel, 0.95 mm.; length of egg strings, 4.36 mm. 



( calif orniensis, from the locality in which it was found). 



Remwrks. — In support of his identification Gurley notes the fact 

 that OncorJiynclius nerka, from which Doctor Evermann obtained his 

 specimens, is the species which occurs in the Klamath River, where 

 Dana's types were found. The species seems to be ai vahd one, 

 although there are no specimens of it now available. For this reason 

 and because Dana's figures are not readily accessible they are repro- 

 duced here (pi. 29, figs. IG and 17) somewhat enlarged, but other- 

 wise just as he pubUshed them. 



SALMINCOLA CARPIONIS (Kr^yer). 

 Lemaeopoda carpionis Kr0yer, 1837, p. 268, pi. 2, fig. 6. 



Remarks. —Ki^jev distinguished this species from salm.onea as 

 follows, a distinction which Bassett-Smith and others have tried to 

 set aside. 



Salmonea, head small, less than a fourth the length of the animal, subtriangular, of 

 the same length and width, directed straight forward or a Httle backward. Arms 

 elongate, equaling or exceeding the length of the trunk and making an obtuse angle 

 with it; bulla recumbent, depressed, oval, yellow, subcartilaginous, and without a 

 pedicel. External egg sacks short, slender, almost filiform, with two transverse series 

 of eggs at the most. 



1 Eight females have since been taken from the same host and locality; they have received Cat. No. 

 43563, U.S.N.M., and will be more fully described later. 



