Smithsonian miscellaneous collections . of Notropis, confoundedunder the general name of minnows, are much smaller than thosementioned. Another interesting American Cyprinid, related to Notropis but one of the most remarkable of our little minnows, is the Ericymbabnccata, which nevertheless appears to have no distinctive vernacularname and is merely one of the host confounded under the designa-tion of minnow. The species is distinguished from all others by theporous or cavernous condition of many of the head bones, especiallythe lower jaw, interopercular and suborbital bones, and the swollenap
Smithsonian miscellaneous collections . of Notropis, confoundedunder the general name of minnows, are much smaller than thosementioned. Another interesting American Cyprinid, related to Notropis but one of the most remarkable of our little minnows, is the Ericymbabnccata, which nevertheless appears to have no distinctive vernacularname and is merely one of the host confounded under the designa-tion of minnow. The species is distinguished from all others by theporous or cavernous condition of many of the head bones, especiallythe lower jaw, interopercular and suborbital bones, and the swollenappearance of the tunnels or channels perforated by the pores. Itis to this condition that the name Ericyviba refers, it being derived gill] NOTEWORTHY EXTRA-EUROPEAN CYPRINIDS 303 from the Greek intensive particle ipc and the noun xjfij3r], species is pretty wide spread in the country watered by thenorthern and eastern affluents of the Mississippi and extends north-ward into Michigan and southward into West Florida, and where. Fig. 43.—Ericymba biiccata. After Jordan and Evermann. it does occur, is tolerably common and locally very rarely attains a length of five inches. The interest of this genus is in the fact that it repeats in the familyof Cyprinids a characteristic which is manifest in isolated generaof a number of other families, but notably in the fresh-water Percids(as in Acerina or Cernua) and Cichlids (as in the Trematocara ofLake Tanganyika). It will be an interesting study for future natural-ists to investisrate the correlation between this structural feature
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