. The Cambridge natural history. Zoology. io8 SKULL OF ECHIDNA affairs. It must he remembered, however, that the Cetacea show the same characters, though it is possible that they too are developed from a low mammalian stock. In the vertebral column we find the typical mammalian seven cervicals; but those characteristically mammalian structures the epiphyses are aud-oss. f:!ycon(i '"^ cor" Fic. 51.—Ventral view of skull oi Echidna acidecda, and right lialf of iiiaiulible. ang. Angle of mandible ; , auditory ossicles ; cond, condyle of mandible : cur, coronoid pr
. The Cambridge natural history. Zoology. io8 SKULL OF ECHIDNA affairs. It must he remembered, however, that the Cetacea show the same characters, though it is possible that they too are developed from a low mammalian stock. In the vertebral column we find the typical mammalian seven cervicals; but those characteristically mammalian structures the epiphyses are aud-oss. f:!ycon(i '"^ cor" Fic. 51.—Ventral view of skull oi Echidna acidecda, and right lialf of iiiaiulible. ang. Angle of mandible ; , auditory ossicles ; cond, condyle of mandible : cur, coronoid process ; max, maxilla ; , occipital condyle ; pal, i)alatine ; »r/.'\ j)remaxilla ; ;j^, pterygoid ; sq, squamosal ; (i/, tynij)anic ring. (After Parker and Haswell.) totally absent in Ecliidna, and only to be seen in the tail-region in Ornitliorhynchus. In having only the capitular head to the ribs, these mammals are evidently far removed from all other mammals, and are even more reptilian than the Theromorphous reptiles. The large clavicles and the iuterclavicle (Fig. 52,. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862-; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. London : Macmillan and Co. ; New York : The Macmillan Company
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