MYOLOGY OF THE CHEIROPTERA. 
163 
Of the three peronsei, the brevis is the largest, then the quinti, then the longus. The 
outer head of gastrocnemius has a sesamoid bone in its origin, from which arises the 
plantaris, and to this head further down a slender soleus is attached. The tibialis pos- 
ticus extends up to the small popliteus. The flexor digitorum is single, with five ten- 
dons and four lumbricales. There are two interossei for each digit, pollex and mini- 
mus included, an abductor of each of the two lateral digits, but no flexor accessorius 
nor transversalis pedis; a superficial flexor digitorum with four tendons separates the 
deep tendons from the plantar fascia. 
The specimen of Galeopifhecus which I dissected was very young, and had been found 
in the act of sucking its mother when she was shot. I obtained it through the kind- 
ness of my friend and former pupil, Dr. MacCarthy, It.N. On account of its youth 
the dissection was not satisfactory in many points, so 1 have only recorded such things 
as were unmistakable. 
The trapezius arose from the lower third of the cervical region, from the upper two 
thirds of the dorsal, and extended in an undivided sheet to the scapular spine ; the levator 
clavicuke was a prominent muscle uncovered by the last, and stretching from the trans- 
verse process of the atlas to the outer end of the clavicle. The rhomboid was single, and 
arose from six dorsal spines; it was inserted into the vertebral edge of the post- 
scapula. 
The dorsi epitroehlearis was a very remarkable muscle, and truly verified its name ; it 
arose from the four lowest dorsal spines and extended, fleshy for its whole length, to 
the inner side of the elbow-joint; it overlay the latissimus dorsi, from which it was per- 
fectly separate. The acromion deltoid was related to the scapular, exactly as in the Bat 
and the Flying Squirrel, and the latter covered the infraspinatus and teres minor. The 
triceps longus was single, and its fleshy fibres were short. The cutaneous polliceal 
muscle in the propatagium arose from the mandibular ramus as far as the chin, being thus 
plainly identifiable with the platysma superior. The teres minor was moderately large ; 
the supinator longus inserted into the upper half of the radius from the lower fourth of 
the outside of the humerus.- The biceps and brachialis anticus were as usual, the coraco 
bracliialis consisting of a medius and a brevis (Wood). The extensor carpi radialis longior 
and brevior united in their fleshy portions and with two tendons ; the extensor ossis 
metacarpi pollicis separate and strong. 
The sartorius arose from the middle of Poupart’s ligament, the gracilis from below 
the spine of the pubis ; they both united at their insertions, and appeared very like the 
muscles in Cejphalotes Pallasii described above. The three adductors were separable, as 
was also the pectineus, a very short muscle. The iliacus was marginal in origin and 
separate from the psoas. A thick carpo-tarsal band extended, as in the Flying Squirrel, 
in the margin of the plagiopatagium. 
The tibialis anticus had a femoral origin, which was very slender, as well as its usual 
head from the lower two thirds of the tibia ; from the same femoral tendon arose the 
extensor digitorum, and, indeed, the tendon seemed to belong to this muscle more properly 
