. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. a--. Fig- E. — Left tympano-periotic of Del- phinapterus leucas Pallas. Posterior end, X Fig. F. — Left tympano-periotic of Del- phinapterus leucas Pallas. Anterior end, X \. closed, as in other Mammals, but drawn out into a long slit-like canal, which is confluent above the superior margin of the inner lip with the fissura tympano-periotica (17). A portion of the knob-like "accessory ossicle " (6) of the tympanic is plainly visible below the overhanging anterior process of the periotic (10). Having
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. a--. Fig- E. — Left tympano-periotic of Del- phinapterus leucas Pallas. Posterior end, X Fig. F. — Left tympano-periotic of Del- phinapterus leucas Pallas. Anterior end, X \. closed, as in other Mammals, but drawn out into a long slit-like canal, which is confluent above the superior margin of the inner lip with the fissura tympano-periotica (17). A portion of the knob-like "accessory ossicle " (6) of the tympanic is plainly visible below the overhanging anterior process of the periotic (10). Having now examined different aspects of the periphery, our next pro- cedure would be to separate the two elements of the tympano-periotic, and observe those surfaces which are presented towards each other, and hence remain concealed when the bones are in natural apposition. These inner faces, however, are precisely the ones which have been oftenest figured and described in the case of fossil forms, and as regards the recent Delphinapterus, the general resemblance to Phocaena is such that the. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
