. Report of the Geological Survey of Ohio. Geology; Paleontology; Mines and mineral resources; Zoology; Paleobotany; Botany. EXTINCT BATRAOHIA. 353 wanting; epiotic and squamosal not distinct; nasalia present; ethmoid composed of two lateral pieces, each forming part of palate; quadrate osseous; mandible toothless, with condyle for the quadrate; teeth pleu- rodont; no "postorbital and supratemporal bones"; first pair haemal branchihyals distinct. PROTEIDA. Caudal vertebrae and frontal bones distinct; inferior pelvic elements not confluent. 0, o, supraoccipitalia, maxillaria, prefront
. Report of the Geological Survey of Ohio. Geology; Paleontology; Mines and mineral resources; Zoology; Paleobotany; Botany. EXTINCT BATRAOHIA. 353 wanting; epiotic and squamosal not distinct; nasalia present; ethmoid composed of two lateral pieces, each forming part of palate; quadrate osseous; mandible toothless, with condyle for the quadrate; teeth pleu- rodont; no "postorbital and supratemporal bones"; first pair haemal branchihyals distinct. PROTEIDA. Caudal vertebrae and frontal bones distinct; inferior pelvic elements not confluent. 0, o, supraoccipitalia, maxillaria, prefrontalia, and nasalia wanting; palatine and pterygoidea present; ethmoid a vertical plate on each side of the cerebral lobes; squamosal and epiotic jiresent; quadrate osseous; mandible toothed; teeth pleurodont; haemal branchihyals, first pair con- nate; no "postorbital and supratemporal ; Fig. 1. Pmz. Amphiuma meani, profile of cranium (from Georgia;; Fma. premaxillary bone; N. nasal; Prf. pre- frontal; P. frontal; Pa. parietal; Mx. maxillary; E. ethmoid; Pro. prootic; Sq. squamosal; Exo. exoc- cipital; Pt. ijtcrygoid; Q. quadrate; Sta. stapes, natural size., UEODELA. Usual cranial bones present, but pterygoids reduced or wanting; quad- ratum osseous, covered by the squamosal; no " postorbital nor supratem- poral bones " ; no epiotic nor supraoccipital; caudal vertebrae and frontal bones distinct; ethmoid, a vertical plate on each side; mandible dentig- erous; teeth pleurodont; inferior pelvic elements horizontal, in contact; no osseous pubis; ilium suspended to a sacral rib. (Mostly no quadrato- jugal.) GYMNOPHIDIA. Usual cranial bones present and distinct, including frontals and ptery- goids ; no supraoccipital nor epiotic; quadrate osseous; caudal vertebrae distinct; no " postorbital nor supratemporal bones" *; ethmoid annulus surrounding cerebral lobes; mandible dentigerous; teeth anchylosed by their (Quadrato-jugal present.) * When
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