FRESH-WATER FISH A^T> MOLLUSCA. 



67 



in a small tank^ without impairing in the least their health 

 or playfulness. 



The Barred Killefish {Fundidus zebra) is found in 

 the salt-water creeks about New York, but thrives well 

 in a fresh-water Aquarium. His body is marked with a 

 variety of silvery white spots and steel-blue dots, which 

 present, at times, a singularly beautiful appearance. He 

 is a vivacious little fellow, full of spirit and mirthfulness. 



Small Eels are sometimes selected for an Aquarium. 

 If quite small, they may answer. Their sinuous move- 

 ments may form an agreeable contrast to the rapid and 

 elegant motions of some of the fish we have named. 



In a large tank, the following would increase the list, 

 in enumerating a variety. We do not recommend them, 

 except in special cases, where space is of not so much 

 moment. 



The Eiver Moon-eye {Hyodon tergisus) is popularly 

 known as Herring, as Eiver Herring, and as the Toothed 

 Herring. We have kept them finely in a capacious tank. 



The Common Sucker {Catostomas communis) is abun- 

 dant in this State. We have caught them of excellent 

 quality for rearing, in the Croton River, 



The Brilliant Ohubsucker {Lobes oblongus) is a hand- 

 some fish. It has a green back, shading into a lemon- 

 yellow at the sides. It is common to most fresh-water 

 streams, both here and in the eastern States. 



The Brown Catfish {Fomelodus pullus) . 



The American Yellow Perch {Per a flavescens). 



