22 SOLENODON PARADOXUS. 
The micostalis (Plate 5, fig. 6, a) or “teres minor” is a small muscle, inti- 
mately associated with the infraspinatus. Its origin is from the glenoid border 
of the seapula, back about 11 mm. along the glenoid margin. — Its insertion is 
by a very short tendon just distal to the insertion of the infraspinatus on the 
trochiter. According to Dobson, this muscle is lacking in Centetes, Gymnura, 
and Potamogale. It is present, however, in Erinaceus and largely developed 
in Myogale. 
The meditriceps (Plate 5, fig. 6, b) is a large, prism-shaped muscle, from 
nearly the anterior third of the glenoid margin of the scapula. It tapers distally 
to a short tendon inserted on the olecranon. 
The ectotriceps (Plate 5, fig. 6, c) arises from a sheet of tendon on the proxi- 
mal part of the crista deltoidea. It is a flat muscle and gradually increases in 
breadth to its insertion on the ectal face of the olecranon, anterior to that of 
the meditriceps, to whose tendons for the space of about a centimeter it is here 
intimately connected. 
The entotriceps (Plate 5, fig. 6) is divisible into three fairly distinct parts. 
The first of these seems comparable with the intermedia and the caudalis divi- 
sions as present in the cat. In Solenodon these two divisions are not to be 
differentiated, but arise as a single muscle from the posterior side of the humerus 
just distal to its head. The insertion is by tendon on the entero-dorsal side of 
the olecranon as far as the sigmoid notch. A second division, probably homol- 
ogous with the division cephalica of the cat, arises along the postero-external 
side of the distal half of the humerus and inserts on the ectal aspect of the ole- 
cranon, ental to the insertion of the ectotriceps. The third division is appar- 
ently the same as the division brevis, and consists of a short bundle of muscular 
fibers from the ectal surface of the epitrochlea to a tendinous raphe near the 
distal extremity of the division cephalica. The condition of the triceps muscle 
in Solenodon seems to be much the same as that described by Dobson for Gym- 
nura, and one is led to infer that its relations are nearly identical in Centetes and 
Potamogale. 
The supinator longus is absent in Solenodon, as in Gymnura, Erinaceus, 
Centetes, Potamogale, and the Talpidae. 
The biceps arises by a single head, as a strong rounded tendon about a centi- 
meter in length from the dorsal lip of the glenoid fossa and base of the coracoid 
process. Its main mass is spindle-shaped and flattened. Distally it passes 
into a tendon that is inserted mainly on to the ecto-dorsal edge of the ulna, just 
distal to the lip of the sigmoid notch; a slip of tendinous tissue also connects 
