24 SOLENODON PARADOXUS. 
In Centetes and Erinaceus this muscle is said to be inserted into a sesamoid at 
the base of metacarpal 5. 
The indicator (Plate 6, fig. 5, f) arises from an origin about 25 mm. long by 
muscular fibers along the ectal border of the ulna beginning near the distal edge 
of the sigmoid notch. The muscle then passes across to the ental aspect of the 
forearm, through the groove between the distal ends of the radius and ulna as a 
flat narrow tendon. At the carpal region the tendon divides into two, the more 
ental of which passes to a tendinous insertion about the dorsal base of the first 
phalanx of digit 1; the more ectal branch goes to a similar insertion on the ecto- 
lateral aspect of the first phalanx of digit 2. A similar condition is found in 
Erinaceus and Centetes. 
The extensor ossis metacarpi pollicis (Plate 6, fig. 5, d) arises by muscular 
fibers along the approximated edges of radius and ulna from the region of the 
ereater sigmoid notch, distally to within 5 mm. of the carpus on the ulna and to 
within about twice that distance on the radius. It then passes as a tendinous 
band, obliquely over the distal surface of the radius to the base of an elongated 
sesamoid bone on the ental side of the carpus, and to the ento-lateral aspect of 
the base of the first metacarpal. The relations of this muscle are said to be the 
same in Centetes. 
The pronator teres (Plate 6, fig. 5, c) has its origin by short tendinous fibers 
from the epitrochlea and passes ectally as a flat sheet to a long tendinous inser- 
tion on about the middle third of the dorsal edge of the proximal portion of the 
radius. 
The flexor carpi radialis (Plate 6, fig. 6, b) is from the anterior border of the 
epitrochlea, arising by tendinous fibers as a long, spindle-shaped muscle. This 
passes into a round tendon whose insertion is at the ventral ental side of the 
base of metacarpal 3. Dobson does not mention this muscle in Centetes, but 
states that in Erinaceus and Potamogale it goes to the base of the second meta- 
carpal. Its condition in Solenodon paradozus is thus more nearly that found in 
the cat, in which a small branch passes also to the first metacarpal. 
The flexor carpi ulnaris (Plate 6, fig. 6, c) arises from the internal condyle of 
the humerus and is inserted by a strong tendon into the pisiform bone as in 
Erinaceus, Potamogale, and Centetes. 
The flexor sublimis digitorum (Plate 6, fig. 6, @) is a narrow flat muscle whose 
origin is wedged in between the heads of the flexor profundus digitorum. It 
arises as a flat tendon about 12 mm. long from the anterior surface of the epi- 
trochlea, about one or two millimeters from the ental margin. The muscular 
