386 MUD-LOVING FISHES. 
the gradual appearance of the fishes your sudden presence 
startled and sent off ; but returning under such circumstances 
they are not the same fish in their movements; for although 
they may appear to swim about fearlessly, they nevertheless 
are watching you, and fail to exhibit many of their peculiar 
habits. An aquarium, even, in which fishes become tame, is 
best watched at a distance, as more is going on generally, 
than when you are near by. Fish are like children, fuller 
of mischief when alone. These remarks, be it understood, 
apply to some species—not all. What we design consid- 
ering as mud-loving species are nine in number, all common 
to the Delaware and its tributaries, at and near Trenton, 
Fig. 87. 
Enneacanthus Métal : 
New Jersey. They are the Spotted Sun-fish ( Enneacanthus 
guttatus,* the Mud Sun-fish ( Acantharcus pomotis), the Mud 
Minnow ( Melanura limi), Mud Pike (Esox porosus), Mullet 
(Moxostoma oblongum), Black Sucker, Catostomus ( Hylo- 
myzon) nigricans, Mud Cat-fish (LAmiurus DeKayi), Eel 
CAnguilla tenuirostris), and the Lamprey (Petromyzon nigri- 
cans). (We consider the Ichthyomyzon appendix as the 
young of the last, or an allied Petromyzon). 
Spotted Sun-fish ( Enneacanthus guttatus). We have very 
* We trust the nomenclature of our fishes is finally established; and no species will 
be farther burdened with confusing synonomy. We follow Cope (Journal Acad. Nat. 
Sci., Phil., Vol. vi, part 3, p. 216, Jan., 1869), in this paper; and if farther changes are 
proposed, feel now as th gh hould adopt tl ith reluct 
