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Show 1890.] ANATOMY OF PODICA SENEGALENSIS. 437 the genus Podica has been already especially compared on account of the skull characters. Three ribs are covered at their origin by the ilia, which just fall short of the posterior margin of the next rib in front. In Fulica only one rib is thus covered, the pelvis being placed Fig. 5. Pelvis of Podica senegalensis, dorsal view; nat. size. further back. In the Divers and Grebes there are two ribs thus covered over by the ilia. In Ocydromus australis the ilia completely cover the origin of one pair of ribs and nearly reach over another, so that there is no great use to be made of this point. The pelvis of Heliornis shows the same peculiarities as that of Podica; the pubes are in the same way united with the ischia and prolonged beyond them ; the fused neural spines of the lumbar vertebrae PROC ZOOL. Soc-1890, No. XXX. 30 |