NO. 2063. ^^ORTH AMERICAN PARASITIC COPEPODS— WILSON. 609 



jointed, the basal joint swollen into a large ventral knob armed with, 

 spines and similar to the one in Salmincola edwardsii (p. 610); the 

 terminal joint narrow and palplike and tipped with a single fleshy- 

 point on the margin next to the exopod. There is also a knob on 

 the outer sm-face of the basal joint, close to the base of the endopod 

 which projects strongly and is armed with curved spines. Mandible 

 stout, broadened toward the base and curved, armed with four large 

 distal teeth, which are curved and bluntly pointed, and one small, 

 sharp proximal tooth. First maxillae short and slender, tipped with 

 two conical spines and without a palp; second maxillae as long as, 

 or even considerably longer than, the trunk, slender, nearly straight, 

 and a trifle enlarged at the tips. Bulla mushroom-shaped, its diam- 

 eter almost thi-ee times that of either arm, its pedicel long, large, 

 and inflated at the distal end. Maxillipeds of medium size, the ter- 

 minal joint curved and tipped with a short curved claw and an 

 inner minute spine; the basal joint with a large papilla on its ven- 

 tral surface, which is terminated by two small papillae, each bearing 

 a spine which seems to be retractile. 



Color (preserved material) a uniform yellowish- white. 



Total length (excluding egg strings), 7 mm. Length of cephalo- 

 thorax, 2.8 mm.; of trunk, 4.2 mm.; of second maxillae (including 

 bulla), 8 mm.; of egg strings, 7 mm. Width of trunk, 2.8 mm. 



(siscowet, Indian name of host). 



Male. — Unknown. 



Remarhs. — ^This species was described and figured by Smith in 1874 

 and has not since been seen by any investigator. Fortunately, some 

 of Smith's original specimens have been preserved in the United States 

 National Museum, and from them the present description and figures 

 have been taken. There is practically little to add to Smith's excel- 

 lent description, but the second antennae and first maxillae are here 

 figured, both of which present specific characters. These, with the 

 peculiar outline of the top of the head, and the equally peculiar 

 papilla on the maxillipeds, distinguish this species from all others. 



SALMINCOLA EDWARDSn (Olsson). 



Plate 30, figs. 30 to 35. 



Lernaeopoda salmonea Mayor, 1824, p. 24. 



Basanisles salmonea Milne Edwards, 1840, p. 509, pi. 41, fig. 3. 



Lernaeopoda edwardsii Olsson, 1869, p. 36.— Wright, 1882, p. 246, pi. 1, figs. 1-11. 



Lernaeopoda fontinalis Smith, 1874, p. 663, pi. 3, figs. 12-14. 



Host and record of specimens. — Twenty-five adult females were ob- 

 tained from the gills of brook trout, Salvelinus fontinalis, at the 

 State hatchery at Wild Rose, Wisconsin, and have received the 

 number 43574, U.S.N.M. A second lot of ten females were taken 

 from the gills of the same host at Caledonia, New York, and are 

 34843 ° —ProcN.M. vol.47— 14 39 



