Note 107 — Chapter XVII · BARRIERS TO DISPERSION OF RIVER FISHES

"In this isolated region of North America, in this zoological island of New England, as we may call it, we find neither Lepidosteus, nor Amia, nor Polyodon, nor Amblodon (Aplodinotus), nor Grystes (Micropterus), nor Centrarchus, nor Pomoxis, nor Ambloplites, nor Calliurus (Chænobryttus), nor Carpiodes, nor Hyodon, nor indeed any of the characteristic forms of North American fishes so common everywhere else, with the exception of two Pomotis (Lepomis), one Boleosoma, and a few Catostomus."—Agassiz, Amer. Journ. Sci. Arts, 1854.