American side of the New York State Conservation 

 Department and on the Canadian side by the Ontario 

 Department of Game and Fisheries. The spawning 

 grounds of several of the summer-spawning fish lie 

 within this area. 



Owing to the fact that there were no laboratory 

 facilities on board the Shearwater during the first 

 season, the work could be carried on only in reason- 

 ably calm weather. For that reason the 3 -day 

 cruises did not always take place as scheduled. 



Due to increased vessel facilities and assistance 

 from Ohio, the area in 1929 was extended to cover 

 the entire lake with the exception of the region 

 west of the islands in Ohio, which was being inves- 

 tigated by representatives of that state and the Fed- 

 eral Bureau of Fisheries. Station 49, located 3 1/2 

 miles east of a north and south line from Point 

 Pelee, marked the western margin of the survey. 



Four regular monthly cruises were made be- 

 tween May 15 and September 20 starting in each 

 case as nearly on the first of the month as weather 

 conditions permitted. These started at Buffalo and 

 terminated at Put-in -Bay, requiring usually 15 days. 

 All of the 50 fixed stations were occupied on each 

 of these cruises. The intercruise interval was uti- 

 lized for special observations and in returning to 

 Buffalo after each cruise. In all 250 stops at sta- 

 tions and about 20 special stations for water sam- 

 ples at harbor entrances were made during the sea- 

 son and 4, 435 statute miles covered. 



number in this case is followed by an alphabetical 

 letter which, except for the immediate vicinity 

 of Buffalo, is "C" for stations along the Canadian 

 shore and "A" for those along the American shore. 



A third report covers the western section of the 

 lake and includes an extensive bibliography (Wright 

 1955). Consequently, no attempt has been made 

 at this time to present a review of former limno- 

 logical investigations. Only references found neces- 

 sary in the text are included in the present bibliog- 

 raphy. 



It will be noted that in the eastern area the lo- 

 cation and the numbers of the stations correspond 

 with those of the previous year (table 2). 



In the present report whenever a station number 

 is referred to the cruise number is also given. In 

 this system each station receives two numbers sep- 

 arated by a decimal point. The first designates the 

 number of the cruise and the second the number of 

 the station. Thus 05. 06 would designate cruise 5, 

 station 6; 06. 06 would indicate the sixth cruise, 

 station 6. The cruise numbers refer to Shearwater 

 cruises only and are numbered consecutively and 

 repeated in each of the two years (table 3). Navette 

 stations are not given cruise numbers. The station 



