THE AXAT03IY OV THE CIiniPANZEE. 35 



The spine. The vertebral formula is C. 7 T. 14 L. 3 S. 6 C. 3. The last piece of 

 the coccyx is narrow and elongated. It may represent more than one element. The 

 head of the first rib encroaches on the seventh cervical vertebra. Tlie head of the 

 fourteenth, about 10 cm. long, rests on a little elevation on the vertebra. Almost 

 touching the head is a rudimentary tubercle. The cartilages of seven ribs reach the 

 sternum. 



The greatest length of the humerus is 31.7 cm., and that of the femur, 32.3 cm. 

 This is stated by way of giving an idea of the size of the bones, which is important in 

 connection with the process of ossification. 



There are few points in tlie bones of particular interest. As usual, there is no 

 supra-trochlear perforation of the humerus. Each femur has a small, but well-marked, 

 third trochanter, and below it a shallow, roughened groove, the fossa hypo-trochanterica 

 (pl.8). 



Muscular System. 



The muscular dissection was limited to the extremities. The plan which 1 i)ursued 

 (with some few lapses) was to describe what I found without refreshing my memory as 

 to chimpanzee anatomy. When this was done, I consulted the authorities. I have made 

 especial use of Mr. Hepburn's^ account of the limb-muscles of the four anthropoids. I 

 give only what seems to me interesting or peculiar. The most important points are 

 probably the arrangement of the flexors of the fingers, the anomaly of the pronator 

 quadratus, the redundance of interossei in both hand and foot, and perhaps the peculi- 

 arity of the feinoi'al adductors. 



Upper Extremity. 



Latissimus-dorni and dorKo-epitrochlearix. The latissimus joins the edge of the 

 teres major and receives fibers from it, which might be said to represent a scapular head. 

 The epitrochlear muscle springs from the anterior .aspect of the tendon of the latLssimus; 

 is perhaps 1 inch broad at origin, runs to tip of the internal condyle, the last 2 1-2 inches 

 being tendinous. This resembles strikingly Beddard's account of " Sally " and differs 

 from all Hepburn's anthropoids. 



Deltoid. Strong. The clavicular part closely connected with the greater pectoral 

 which would appear to be the rule. Some of its fibers seem to join the brachialis anticus. 



' .Jcuu'ii. auat. pliysiiil-. vul. 2(i. 



