432 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



With the exception of a lot of material sent by Dr. C. A. Kofoid 

 and another lot, comprising the results obtained by the steamer 

 Albatross during her Pacific cruise in 1001, sent by Dr. William E. 

 Bitter, all the specimens collected under the auspices of the Bureau 

 of Fisheries had been turned over to the U. S. National Museum, 

 and came to the author in the collection sent from that institution. 



It has been the aim to include all this material in the present list 

 together with those copepod parasites which have been described by 

 other authors as occurring on the Pacific coast fishes. But it must 

 be remembered that this is the first attempt at anything of the sort, 

 and that such primary collections are more or less defective. It is 

 hoped, however, that it may serve as a basis for future investiga- 

 tions. In those cases in which the parasites have already been ac- 

 ceptably described elsewhere it has been considered necessary to give 

 merely the name and a reference to the literature which tells of their 

 occurrence on Pacific coast fishes, or which describes and figures 

 them. 



The sources from which have been received the material illustra- 

 ting each species have been given as far as known, with the addition 

 of such brief comments as seemed advisable. 



On the other hand, those genera and species which have proved 

 new to science have been fully described and figured. 



While the proportion of these new species is apparently very large, 

 this is no more than should be expected in changing from one ocean to 

 another, or even from the Asiatic to the American side of the Pacific. 

 But the novelty of the characters of these new forms is of much less 

 importance than the close relationship which they show between spe- 

 cies inhabiting widely remote localities. He who really cares to go 

 into details will find that there are close correspondences between 

 the Atlantic and Pacific copepods similar to those found in other 

 groups of animals, particularly, perhaps, in the fishes which serve as 

 hosts for these parasites. As at present prepared the list includes 41 

 species, of which 17 are new to science, including 5 new genera. 



Family ARGULIDiE. 



ARGULUS PUGETTENSIS Dana. 



Argulu.s pugettensis Dana, L852, p. 1351, pi. xciv, fig. 2. — Wilson, 1902, 

 p. 711, pi. xv. 



Host and record of specimens. — The host of the specimens ob-^ 

 tained by Dana was unrecorded. A single female war; taken from a 

 ('oho salmon. ncorhynchus kisutch, at Union Bay in June, 1903, 

 and was obtained and sent with the other material by Doctor Mc- 

 Clendon. It is Cat. No. 38561, U.S.N.M, 



