OR, THE HOME-CULTURE OF FRESH-WATER PLANTS. 
that very distinct species, performed by the female. 
This assertion is founded on actual observation; a 
female of the species in question having formed her 
nest, deposited her spawn, and covering it care¬ 
fully over, watched it assiduously, attacking any 
approaching enemy, just as is the habit of the males 
in the other species. The nest appears, however, to 
have been a far inferior structure to that of the 
male architects. 
There are many other particulars relating to the 
nidification of these interesting little fishes; hut 
space will not allow of further detail in this place. 
Enough has been said, however, to show how very 
interesting a colony of Sticklebacks might he made 
in an Aquarium, especially if all the species were 
collected, and their abode made sufficiently com¬ 
fortable to induce them to feel quite at home and 
exhibit their curious nest-building instinct in full 
confidence and security. 
79 
