750 FISHES—INTRODUCTION. 
The State of Ohio includes two well defined faunal areas, so far as its 
fishes are concerned. These are Lake Hrie and its tributaries on the 
north, and the Ohio River and its tributaries on the south. Of about 
163 species found in the waters of the State, about 40 may be considered 
characteristic of the Lake fauna, seldom being found in tributaries of the 
Ohio. A large number, about 67, belong properly to the Ohio River 
fauna, the remaining 56 being common toboth. The species found in the 
lake number therefore about 96,and those in the river, about 123. In 
nearly every case where a species is common to both faune, northern or — 
lake specimens will be found to be deeper in body and deeper in color 
than the southern or river specimens. Some of the species belonging 
properly to the lake region occur in the headwaters of the Scioto, Miami, 
etc. I suppose this to be due to the fact that the watersheds in the State 
are sometimes low and swampy, permitting at times the interchange of 
fishes. Why these species do not spread southward is not explained, 
but this is probably due to something in the water or the climate. _ 
Of species belonging especially to the Lake fauna, we may enumerate 
the following: 
Acipenser rubicundus, Coregonus tullibee, 
Amiurus catus, Cristivomer namaycush, 
Carpiodes thompsoni, Percopsis guttatus, 
Catostomus longirostris, Hsox nobilior, 
Couesius prosthemius, | Eucalia inconstans, 
Rhinichthys cataractex, Pygosteus occidentalis, 
Hudsonins storerianus, Lota maculosa, 
Telestes elongatus, Uranidea spilota, 
Coregonus quadrilateralis, Triglopsis thompsoni, 
Coregonus clupeiformis, EKupomotus aureus, 
Coregonus hoyl, Perea americana, 
Coregonus artedi, Microperca punctulata, 
Coregonus nigripinnis, Boleichthys eos. 
Of species characteristic of the Ohio River fauna, the following may be 
mentioned : 
Scaphirhynchops platyrhynchus, Minnilus ariommus, 
Pelyodon folium, . Minnilus scabriceps, 
Litholepis spatula, Lythrurus diplemius, 
Noturus flavus, Hudsonius stramineus, 
Pelodichthys olivaris, Pomolobus chrysochloris, 
Amiurus xanthocephalus, Dorosoma cepedianum, 
Amiurus melas, Centrarchus viridens, 
Ichthelurus robustus, Xenotis lythrochloris, 
Teththelurus furcatus, Lepomis anagallinus, 
Ichthyobus bubalus, Lepomis macrochirus, 
Bubalichthys urus, Htheostoma squamiceps, 
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