Tank No. 2. 



Tank No. 2. 



Fishes only. Ohlata (fig. 14), silver, with a black root to its tail; 

 Box (figs. 12 and 13). 

 Plants. The green sea-lettuce {Ulva lactitca) serves as food 

 for the fish Box salpa. 



Fig. 12. Box salpa, 1/2 °at. sire. p. 115. 



Fig. 13. Box boops, '/o nat. size. p. 115. 



Fig. 14. Oblata /nelatucro. 1/2 "^.t. size. p. 115. 



