VII BONES OF HAND 169 
which these latter bones are connected with the sternum is 
curiously like their mode of connexion with the spinal column at 
their other end. With this may be possibly compared the double 
articulation of the single rib (which articulates with the sternum) 
in the Rorquals. In Cycloturus this mode of articulation does 
not occur. 
The manus of JMyrmecophaga is five-fingered. Of these 
the third digit (as in Pcrissodactyles) is the most prominent ; 
Fie. 95.—A, Manus of Great Anteater (Wyrmecophaga jubata). x4. B, Manus of 
Little Anteater (Cycloturus didactylus). x2. c,Cuneiform ; 7, lunar ; 77, magnum ; 
p, pisiform ; s, scaphoid ; ¢d, trapezoid ; fm, trapezium ; wu, unciform ; J-V, digits. 
(From Flower’s Osteology.) 
> 
it is at least double the width of the second or third finger; the 
pollex is very slender. _ In the little Cycloturus this is carried to 
a greater extent: the third digit is relatively enormous; the first 
and the fourth have become quite rudimentary; while the fifth is 
only just recognisable as a minute ossification. 
The chevron-bones in the tail surround a well-developed rete 
mirabile, a rete being found in precisely the same position in 
the Eastern Manis. Tamandua has also retia, which are also 
found in the Spider-monkeys. 
Cycloturus is by far the smallest of the Anteaters. It has 
