. Report of the Geological Survey of Ohio. Geology; Paleontology; Mines and mineral resources; Zoology; Paleobotany; Botany. EXTINCT BATRACHIA. 363 fluent with the corresponding superior element, and the first is similarly confluent, or, as Fischer interprets it, the first branchihyal of the supe- rior series extends to the axialhyal (fig. 7, b'). In Muraonopsis a greater divergence from the archetype exists. With all the peculiarities of Pro- tonopsis, it further almost loses the second haemal element, bv", which ap- pears at maturity as a process on the first pleural element. Fig. P
. Report of the Geological Survey of Ohio. Geology; Paleontology; Mines and mineral resources; Zoology; Paleobotany; Botany. EXTINCT BATRACHIA. 363 fluent with the corresponding superior element, and the first is similarly confluent, or, as Fischer interprets it, the first branchihyal of the supe- rior series extends to the axialhyal (fig. 7, b'). In Muraonopsis a greater divergence from the archetype exists. With all the peculiarities of Pro- tonopsis, it further almost loses the second haemal element, bv", which ap- pears at maturity as a process on the first pleural element. Fig. PHOTONOPBIS HOBBIDA. These characters may be tabulated as follows: A Third hsemal branchihyal present. X First and second hsemal branchihyals free and distinct XX First and second hsemals separate from each other, but confluent with their pleural elements XXX First and second distinct from pleurals, but united with each AA Third hsemal element wanting. X Second hsemal element reaching the axis , Larvse, XX Second hsemal element reduced, not reaching axis., Coeytinvs, Protonopm. Amphiwma. Necturus. .Siren. AmUystoma, Triton, Salamandra. .Proteus. Now, it has been pointed out that Cocytinus agrees with the last named genera in the large development of the first pleural and haemal branch- ihyals, and that it agrees with them both in the presence of the second and third hsemal elements. But these are more distinct than in either of those genera, and the third is larger and supports the fourth as well as its own pleural element. (Fig. 4, bv", bv'".). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Survey of Ohio. Columbus, Nevins & Myers, state printers
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