REPORT OF COMMISSIONERS OF INLAND FISHERIES. 29 



IV. The Continued Examination of the Physical and Bio- 

 logical Conditions of the AVaters of the Bay, Begun 

 IN 189S. 



The following charts represent the observations made during the 

 past year of the air and water temperature and the water density. 

 Some of them cover only the months during which the lobster 

 hatching was going on, while the observations of water temperature 

 extend over the entire year. (Charts III, IV, V, VI and VII.) 



As a beginning of the report of the examination of the biological 

 condition of the Bay, two lists are appended, one of the shell-fish or 

 mollusca which have been found in the Bay, and the other of the 

 fishes which occur in Rhode Island waters. 



The lists have been prepared by collecting all authentic observa- 

 tions found in the literature and adding to these all data in the 

 hands of the Commission. 



The list of mollusca was prepared by Mr. E. W. Barnes and the list 

 of fishes by Mr. H. C. Tracy. To the list of fishes is added a short 

 illustrated description of the Herring Family, a group of fishes in 

 which there exists considerable confusion as regards the names in 

 use by fishermen. 



