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 sliort 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 tlic anterior edge of the tibia to the 

 proximal end of the naviculars 



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 intermis 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 

 antl 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 tlie dorso-lateral angle of tlie tail. 



The levator caudae cxtcnuis 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-coccygci , 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 



