LVI BIOLOGICAL SOCIETY OF WASHINGTON. 



were successfully operated on the same river, and about 30,000 

 pounds beyond what they were able to utilize were thrown away in 

 a single day. 



Mr. Earll thought that the time was hardly ripe, and, if it were, 

 the statistics were not available for making such broad generaliza 

 tions regarding the success or failure of fish-culture. It was grati 

 fying to know that practical business men like Mr. Booth, who had 

 every opportunity of observation, and had large interests at stake, 

 should already be more than satisfied with the results that had come 

 under their observation, and he thought that it might be confidently 

 expected that within the next few years the catch would be very 

 noticeably increased, though, of course, a limit would ultimately 

 be reached, depending upon the enemies of the species and the food 

 which it could find in its natural surroundings. 



Col. Marshall McDonald read a paper on THE INFLUENCE OF 

 TEMPERATURE UPON THE MOVEMENTS OF FISH IN RIVERS,* in which 

 the fluctuations of the catch of shad in the Potomac and Susque- 

 hanna rivers for 1881, '82, and '83 were explained by reference to the 

 varying temperature of the waters of ocean, bay, and river at the 

 time of their anadromous movements. This paper was illustrated 

 by diagrams. Owing to the lateness of the hour, the Society then 

 adjourned, without discussion. 



The following paper was read by title : 



Mr. G. BROWN GOODE and Dr. T. H. BEAN. A new genus and 

 species of Pediculate Fishes {Halieutella lappd]^. 



SIXTIETH MEETING, March 22, 1884. 



Prof. C. V. Riley, Vice-President, occupied the chair. Fifty 

 members were present. 



Col. Marshall McDonald exhibited a chart showing the natural 

 and restricted river distribution of the shad. 



^1884. MCDONALD, MARSHALL. Natural Causes Influencing the Move 

 ments of Fish in Rivers. <Trans. Amer. Fish-Cultural Association, I3th Meet 

 ing, 1884, pp. 164-170. 



fProc. Biol. Soc., Washington, II, p. 88, 1882-84. 



