. The common frog. Frogs. 8o THE COMMON FROG. [chap. mediately in front of the branchial arches, continues to be so connected and becomes one of the two " cornicula," while the rudimentary relics of the branchial arches which persist become what \ve have seen in the adult as the cornua of the os hyoides. Thus the anatomy of the tongue-bone of the frog, studied in its progressive changes, reveals to us that otherwise unsuspected relations exist in certain parts of the tongue-bone of man. It exhibits to us the cornua of his os hyoides as related to those large and complex branchial arc
. The common frog. Frogs. 8o THE COMMON FROG. [chap. mediately in front of the branchial arches, continues to be so connected and becomes one of the two " cornicula," while the rudimentary relics of the branchial arches which persist become what \ve have seen in the adult as the cornua of the os hyoides. Thus the anatomy of the tongue-bone of the frog, studied in its progressive changes, reveals to us that otherwise unsuspected relations exist in certain parts of the tongue-bone of man. It exhibits to us the cornua of his os hyoides as related to those large and complex branchial arches which play so important a part in the fish and form so relatively large a portion of its skeleton. The fourth circumstance (the last here to be noticed) connected with the frog's skull concerns the relative position and size of certain of its enveloping bones. When the skull of the frog is viewed from above, a large vacuity is seen to exist on each side, between the brain-case and the great arch of the upper jaw. In the hinder part of this space is situate the temporal muscle, which by its contraction pulls up the lower. Fic. 44.—Dorsal view of skull of Pclobates, sliowing bony lamellae behind the orbits. jaw and closes the mouth ; and the hollow in which this muscle lies is called the temporal 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 Mivart, St. George Jackson, 1827-1900. London, Macmillan and co.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1881
