. The common frog. Frogs. VI.] THE COMMON FROG. 83 independent origin of structures, so similar that at first sight their similarity might well have been deemed a conclusive evidence of Fig. 47.—Lateral view of skull of Lophiomys, showing bony lamellse lx:hind the orbit. Here, also, we have a memorable caution against hasty inferences from structural similarities. If this resemblance and that of the dorsal shields are, when taken together, no signs whatever of special .genetic affinity—it is difficult to say what structural likenesses are to be deemed unquestionable evidences of a c
. The common frog. Frogs. VI.] THE COMMON FROG. 83 independent origin of structures, so similar that at first sight their similarity might well have been deemed a conclusive evidence of Fig. 47.—Lateral view of skull of Lophiomys, showing bony lamellse lx:hind the orbit. Here, also, we have a memorable caution against hasty inferences from structural similarities. If this resemblance and that of the dorsal shields are, when taken together, no signs whatever of special .genetic affinity—it is difficult to say what structural likenesses are to be deemed unquestionable evidences of a common ancestry. Passing now to the skeleton of the limbs, we come to a character of great significance, as it is one which serves to distinguish all the limbed species of the frog's class from lower vertebrates. The character is very significant, because all Batrachians, in spite of their numerous and important fish affinities, differ from all fishes, and agree with all higher classes in that they— ii they have limbs at all—have them divided into those very typical segments which exist in man ; namely, shoulder»bones, arm-bones, wrist-bones, and hand- bones ; and into haunch-bones, leg-bones, ankle-bones, and foot-bones respectively. It is difficult, then, to avoid the belief that in the Batrachian class we come G 2. 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
