. Elementary lessons in zoölogy : a guide in studying animal life and structure in field and laboratory. Zoology. THE RABBIT. 256 its position indicates that it may have belonged originally to the first. Study the action of atlas and axis, and note that the head can be nodded backward and forward on the atlas, but that, in its rotation, the atlas turns round the odon- toid process of the axis. III. The Skull. — In the skull, note again the direction of the teteth and their position in the jaws. Note the articulation of the lower jaw or mandible with the remainder of the skull. Observe the two
. Elementary lessons in zoölogy : a guide in studying animal life and structure in field and laboratory. Zoology. THE RABBIT. 256 its position indicates that it may have belonged originally to the first. Study the action of atlas and axis, and note that the head can be nodded backward and forward on the atlas, but that, in its rotation, the atlas turns round the odon- toid process of the axis. III. The Skull. — In the skull, note again the direction of the teteth and their position in the jaws. Note the articulation of the lower jaw or mandible with the remainder of the skull. Observe the two rounded occipital con- dyles beside the foramen magnum. Observe that the orbits communicate through the interorhital foramen. Note that the bones of the top of the cranium meet each other by jagged sutures. The following bones should be readily distinguishable in an adult skull. The occipital forms a complete bony ring around the foramen magnum. It is formed origi- nally of a number of separate occipital bones. Proceed- ing forward on the dorsal surface, a small median inter- parietal bone will be found fitted in between the front of the occipital and the posterior angle between the two parietals, which meet by a median suture directly in front. The parietals form the greater part of the roof of the cranial cavity. Anterior to the parietals, a pair of large frontals complete the roof of the cranium in front, and send out a large crescentic process above each orbit, and form the dorsal third of the orbital wall. The frontals meet by a median dorsal suture. Anterior to the fron-. Skull of Rabbit (side view).. 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 Needham, James G. (James George), 1868-1956. New York : American Book Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
