168 OSTEOLOGY OF ANTEATERS CHAP. 
posterior nares backwards. This is also, of course, a character 
of various lower vertebrates. Another Whale-like character in 
the skull is the weak character of the mandible, which does 
not give off a marked coronoid process. But then in neither 
group is there much mastication. The tympanic, periotic and 
squamosal are ankylosed together. A peculiarity of the cervical 
Fic. 94.—Side view of three 
mesosternal segments of a 
young Anteater (Zuman- 
dua), showing the mode of 
articulation of the sternal 
rib (sr). mst, The upper 
or inner surface of the 
mesosternal segment; sy, 
the synovial articulation 
Fic. 93.—Skull of Anteater (Myrime- between the segments. 
cophaga). Ventral view. Letters ao Flowers Osteology, 
as in Fig. 92. In addition, d.0¢, after Parker. ) 
basioceipital ; glen, glenoid sur- 
face for mandible; pter, ptery- 
goid. (From Parker and Has- 
well’s Zoology.) 
vertebrae is that (as in the Camels) the vertebrarterial canal of 
several of the vertebrae perforates the pedicle obliquely. There 
are fifteen or sixteen dorsal and three or two lumbar vertebrae. 
The additional zygapophyses upon the former have been already 
referred to. The mode of articulation of the ribs is highly 
singular. 
Each segment of the sternum (of which there are eight) is 
separated from the next by a synovial membrane: and it has on 
either side two facets for articulation with the ribs. . The way in 
