Plate TIT. 



Fig. 1.— The pond as seen from the southwest at low water. Our hatching plant is in the fore- 

 ground. A wooden fence, F2, is seen in the foreground, and one, Fl, farther back. These 

 two fences form the boundaries of sub-division IV. Sub-division V. is in the foreground. 



iig. 2. -The pond at high water viewed from an upper window of the mess-house. The cement 

 pound IS seen in the foreground. Wooden partitions at the right hand subdivide the pound 

 into three small compartments and one large one. The rearing jilant may lie .seen at th« 

 farthest end of the pond. 



38a— ]<J10— p. 48 



