362 BULLETIN OF THE BUREAU OF FISHERIES. 



This species is associated with glochidia of the Quadrula group, and its presence in considerable 

 numbers upon any fish indicates that its host would make a good carrier of Quadrula glochidia. It is 

 worthy of note that these two species, centrarchidarum and cceruleus, which accompany the two groups 

 of glochidia, are associated upon those fish which serve as hosts for the glochidia and are often foimd 

 together, while centrarchidarum and versicolor are never found upon the same fish although they accom- 

 pany the same group of glochidia. 



Ergasilus chautauquaensis Fellows. 



Ergasitus chautauquaensis Fellows, Proc. Amer. Soc. Microscopists, vol. 9, p. 246, i plate, unnumbered; Wilson, Proc. 

 U. S. Nat. Mus.. vol. 39, p. 343, pi. 46. 



Host and record of specimens. — This species was originally discovered in the tow of Lake Champlain 

 and both sexes were afterwards found by the present author in some samples of tow from Lake Mendota 

 at Madison, Wis.; these specimens received catalogue no. 38617, U. S. National Museum. It has not 

 thus far been foimd upon any fish , but in all probability its habits are like those of the new species elegans. 

 The males are free-swimmers throughout life and the females swim freely imtil their eggs are ready to 

 pass out into the external sacks. The present species will probably be found at another time of year 

 upon the gills of some fish in Lake Champlain or Lake Mendota. 



Ergasilus funduli Kr^yer. 



Ergasilus funduli Kr0yer, Naturhistorisk Tidsskrift. (3), vol. 2, p. 228, pi. 11, fig. i, a-f; Wilson, Proc. U. S. Nat. Mus.. 

 vol. 39. p. 328. 



Host and record of specimens. — Kr0yer found a few specimens of this species on the gills of Fundulus 

 ocellaris (F. limbatus Kr^yer) taken near New Orleans in the Mississippi River. This is another of the 

 marine or brackish water fish that comes up the river a little ways, but its parasites can not be regarded 

 as true fresh-water species. 



Ergasilus lizse Kr^yer. 



Ergasilus lizce Kr^yer, Naturhistorisk Tidsskrift, (3), vol. 2, p. 232; Wilson, Proc. U. S. Nat. Mus., vol. 39, p. 340. 



Host and record of specimens. — This is another species captiired by Kr^yer near New Orleans on the 

 gills of Mugil curema (M. liza Krjziyer). Like the preceding, it can not be regarded as a true fresh-water 

 species, neither have any fiulher specimens ever been found. 



LERN^OPODID^. 

 Salmincola califomiensis (Dana). (PI. lxx.) 



LermBopoda califomiensis Dana, U. S. Exploring Expedition during the years 1B38 to 1842, vol. 12, p. 1379, pi. 96. fig. la. ib. 



SalTnincola califomiensis Wilson, Proc. U. S. Nat. Mus.. vol. 47, p. 605. 



Host and record of specimens. — Eight females were obtained from the gills of Oncorhynchus nerka at 

 Big Payette Lake, Idaho, June, 1914, and were sent to the auther from the United States Bureau of 

 Fisheries. They have received catalogue no. 43563, U. S. National Museum, and since Dana's original 

 specimens have been lost they will serve as surrogate types of the species. 



Specific characters of female. — Dana's original description and figiu-es were excellent as far as they 

 went, but he included only the general body characters and no appendages were mentioned except the 

 second maxilla. 



These new specimens show a wider and shorter body, strongly flattened on the ventral surface , and in 

 the larger females showing distinct ventral grooves of segmentation. The cephalothorax is inclined 

 nearly at right angles to the trunk; the contoiu" of its dorsal surface is clearly shown in figure 77 and is 

 very different from that of any other species of the genus, approaching most closely that of salmonea. 



The first antennae are very short, apparently three-jointed, and tipped with a minute spine; the 

 second antennse are long and stout, the basal portion two-jointed, the rami one-jointed and about the 

 same size, the exopod tipped with a fairly large chela, the endopod with two or three small spines; on 

 the ventral siu'face of the exopod near the base of the chela is a peculiar compound spine. The mandi- 

 bles are long and slender, with strongly hooked teeth; the first maxillae are short, somewhat swollen at 

 the center, and end in three small spines of about the same size; the second maxillae in younger speci- 

 mens are smooth and longer than the trunk, in older females much wrinkled and shorter than the trunk. 

 The maxillipeds are large and stout, the basal joint considerably swollen and armed on its inner margin 



