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REPORT OF COMMISSIONER OF FISH AND FISHERIES. 153 
began for the Fish Commission an exhaustive inquiry into the develop- 
ment and spawning habits of the lobster, one of the most interesting 
marine forms now being propagated artificially at the Woods Holl Sta- 
tion. He also collected material bearing upon the embryology of other 
crustaceans inhabiting this region. 
Prof. Edwin Linton, of Washington and Jefferson College, who has 
been engaged for several years in a study of the entozoan and other 
_ worm parasites of fishes, was employed to continue his field researches 
and to make additional observations in respect to this subject. Fish 
diseases, so far as they have been investigated, appear to be almost 
entirely the result of parasitism in one form or another, and it is, there- 
fore, very important that the relations of these low organisms to their 
respective hosts should be made out with as much care as possible. 
Dr. C. F. Hodge, of Clark University, was at Woods Holl during the 
first part of the summer, and afterwards joined the steamer Fish Hawk 
as naturalist in connection with the oyster investigation. While at the 
station he was occupied in making observations upon the feeding habits 
of larval lobsters, and in attempting to rear them through their free- 
swimming stages, during which period they are subject to great mor- 
tality. ~ 
Mr. James I. Peck, of Johns Hopkins University, was engaged to 
investigate the habits and distribution of the young of the seup and 
sea bass, two of the principal food-fishes of the Vineyard Sound region. 
His observations were made both in the field and with the aid of the 
aquaria. 
Johns Hopkins University was represented at the station by four inde- 
pendent workers, Dr. K. A. Andrews, Mr. T. H. Morgan, Mr. 8S. Watase, 
and Mr. kh. P. Bigelow. Dr. Andrews investigated the anatomy and de- 
velopment of certain annelid worms, and Mr. Bigelow the comparative 
histology of the discophore meduse, and the habits and the physiology 
of physalia. The researches of Mr. Morgan were mainly in the direction 
of the phylogenetic life history of jelly-fishes, of which he examined speci- 
mens of Cyaneaartica, Aurelia flavidula, and Pelagia, but also paid some 
attention to the or carne of as of which three species are 
found in this region. Mr. 8S. Watase continued his studies, begun in 
1888, on the structure and relationship of the eyes of crustaceans and 
echinoderms. Preliminary reports on this subject had iia been 
published by hin. 
Mr. W. MeM. Woodworth, Mr. C. B. Davenport, and Mr. E. R. Boyer 
were present as Petes cn ites of Harvard University. Mr. Wood- 
worth was chiefly interested in tracing the development of a small para- 
sitie planarian which infests the gill lamelle of the king crab; Mr. 
Davenport, in studying the structure and development of marine and 
fresh-water polyzoa, and of Bopyrus palamonites, the latter being an 
isopod parasite living on the common prawn (Palemonites vulgaris); 
