Page:The Osteology of the Reptiles.pdf/40

22 Ophidia, Amphisbaena, Rhiptoglossa of the Squamata. In the Chelonia (Fig. 30 ) they have been identified with a plate of bone intercalated between the descending plate of the parietal and the basisphenoid of many forms. Their real homologues are yet doubtful; by some they have been identified with the alisphenoid of the mammals.





Supraoccipital (so). (Figs. 9, 21, 42 .) Unpaired, articulating with the parietals and interparietals above, the exoccipitals, paroccipitals, and proötics, and including a part of the semicircular canals formerly believed to be in a separate bone called the epiotic, but which has never been demonstrated in any air-breathing