AQUATIC LIF^E; I43 



Vorticella seemed to be very fond of the blue-green algae, Anahaena 

 flos-aquae. 



\ Sandusky Bay Plankton. 



July 27, 1916. 



Towing No. i ai surface. Towing No. 2 ^ distance to hotlom. 

 Cyclops. Ceralium. 



Naiiplius. Cyclops. 



Ce^-a^iMW (numerous). Difflugia. 



Vorticella. Daphnia kalbergensis. 



Rotijera (numerous). Nauplius. 



Great abundance of animal life throughout Bay. 



Starve Isi^and. 

 July 25, 19 1 6-. 



Starve Island is located about 20 miles from Cedar Point and 

 about one mile from Put-in-Bay. The island is made up of about ^ 

 of an acre of limestone and only a slight amount of vegetation 

 occurs on the northeast corner (Platell). 



This island is the nesting place of both the common and black 

 tern and all ages of the birds were found. The youngest ones were 

 found protecting themselves from the sun's heat by keeping in the 

 shade of rocks. This was also a striking example of protective 

 coloration. Found one garter snake and this was the extent of life 

 on the island. ^ 



Abandoned Quarry — Marblehead, Ohio. 

 July 15, 1916. 

 Abandoned quarry at Marblehead, three or four years old, a 

 typical rock bottom pond. Observations and reading were taken 

 at three stations. Breezy and very bright sunlight. 

 Station i. 



Located about 50 feet above dock near the center of the pond. 

 Rocky bottom and only a slight trace of algae. Depth 7 feet, 4 inches. 



Temperature. 



Surface. 28 C. 



)4 dis.. to bottom. .27 C. 



Bottom 21 C. 



Carbon dioxide content. 



At surface i c. c. per M. 



At bottom 7 c. c. 



2 ft. below surface... 5 c. c. 

 7 ft. below surface.. ..5 c. c. 

 }4 ft. below surface.. ..3 c. c. " 



