714 



ZOOLOGICAL SOCIETY BULLETIN. 



ON THE COLLECTING BOAT. 

 Preparations for breakfast under w 



SETTING THE TRAPS AT THE EDGE OF THE REEF. 

 Noting its position by means of a water-glass. 



Photos by L- L. Mowbray. 



for ;ifratinj>; tlic water, in order to prevent any 

 considerable decrease in temperature. 



Angel-fi.sh and parrots will be very inactive 

 at a temperature of 0.';° and at (iO° Fahrenheit 

 will die. 



The Serrnnidac and most of the bottom fish 

 will stand a temperature of .)8°, although at 

 this temperature they are not at all .ictive. 



Butterfly-fish, squirrel-fish and Spanish hog- 

 fish will stand onlv .iboiit (>'2'' as a lower limit. 



'I'lie morays can endure a temperature a little 

 below 60°. The trigger-fish, (Ballistes) can 

 go safely to as low a temperature as 44°. 



Later in the season, that is, after the middle 

 of July, the water is carried gradually farther 

 north as far as to Scotland Lightship off Sandy 

 Hook, but never north of this point except in 

 case of the air pump being disabled. 



The catch of a season will run from seventy- 

 five to one hundred species. 



