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 ; but 

 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 be 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. 



