32 SOLENODON PARADOXUS. 
digitorum tibialis. Distally it passes into a strong tendon that runs along the 
ventral groove of the os calcis and spreads out over the sole of the foot. Here 
it is joined by the tendon of the flexor longus digitorum or tibialis and then sends 
a large tendon to the ventral surface of each digit. 
Two short stout tendons bind the foot to the bones of the lower limb. The 
one is from the distal end of the fibula at its ectal margin and passes to the 
dorsal edge of the os calcis posterior to the articulation with the astragalus. 
The second tendon is on the ental side from the anterior edge of the tibia to the 
proximal end of the naviculare. 
MUSCLES OF THE TAIL. 
The tail of Solenodon is capable of almost no lateral movement, but may be 
slightly elevated and depressed. In section it is nearly quadrangular proxi- 
mally after the skin has been removed to expose the muscle masses. These are 
chiefly four. 
The levator caudae internus is the most dorsal, and is continuous with the 
semispinalis of the back. It passes dorsal to the metapophyses, and breaks into 
tendinous threads that form a distinct bundle running the length of the dorsal 
side of the tail. On the distal two thirds of the tail these tendons become 
inserted on the anterior zygapophyses. This mass of fibers is joined by small 
tendons from muscles that arise from the metapophyses of the caudal vertebrae 
and by others from the dorsal portion of the vertebrae between the spines and 
the zygapophyses. The tendinous bundle resulting from these. fibers, tapers 
to the extremity of the tail and forms the dorso-lateral angle of the tail. 
The levator caudue exlernus is smaller. It is a bundle of small muscles that 
arise by tendons from the median edge of the anterior portion of the ilium and 
from the metapophyses of the sacrum. These unite and pass distally as a thin 
lateral bundle connecting the metapophyses of the caudal vertebrae. 
The ventral musculature of the tail is mainly from the sacro-coccygei, one on 
either side of the mid-ventral line, below the metapophyses. These arise each 
as an elongated mass from the ventral side of the sacral vertebrae, medially. 
Just distal to the ischium they pass into strong tendinous strands that shortly 
form a rounded compact bundle, tapering to the distal end of the tail. This 
bundle forms the ventro-lateral angle of the tail on each side as seen in section, 
and fills the space between the chevron bones and the metapophyses. 
Ventrally a small muscle arises from the posterior end of each chevron bone 
