. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 174 Annals ok the Carnegie Museum. other forms the basitemporal area is much contracted, while in the dried skull the tympanic cavity is so exposed that no little care is re- quisite to locate its exact boundaries. The foramina for the pneumo- gastric, glossopharyngeal, hypoglossal nerves and internal carotid ar- tery, relatively occupy their usual sites, as seen elsewhere in the Class. Upon this inferior view of the skull we really see the under side of the occipital condyle, as its form and
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 174 Annals ok the Carnegie Museum. other forms the basitemporal area is much contracted, while in the dried skull the tympanic cavity is so exposed that no little care is re- quisite to locate its exact boundaries. The foramina for the pneumo- gastric, glossopharyngeal, hypoglossal nerves and internal carotid ar- tery, relatively occupy their usual sites, as seen elsewhere in the Class. Upon this inferior view of the skull we really see the under side of the occipital condyle, as its form and articular surface appear only in full view when the skull is looked at directly from behind. This direct posterior view of a bird's skull is a very instructive one, a fact that was thoroughly appreciated by so talented an anatomist as Garrod, who presented us with a number of them among his valued papers, as for instance where he makes the telling comparisons among the skulls of Chaitiia derbiaiia, ClocpJuii^a i/iage/Ia/i/ccx and Mitiia tu- bcrosa (P. Z. S., 1876, pp. 189-200).. Fig. 7. The sternum ai Ardca lierodias, viewed from helow. Natural size. Such a view of the skull of this Heron is shown in Figure 5, where the broad crotaphyte fosste are seen, separated from each other in the median line above by an exceedingly narrow space. The supra-occi- pital region stands out prominently, partially overhanging the sub- circular foramen magnum. Regularly reniform, with the notch up- wards, the large occipital condyle is here better seen, jutting directly backwards from its lower margin. Beneath, and in the middle region, the pterygoids and the four carinations of the palatines come into view. These are flanked on either side by the ponderous quadrates, which latter show the large jjneumatic foramen in each, leading into their hollow Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration a
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