on Troglodytes Niger. 379 



ed to thirty-three, precisely the same as in man. The num- 

 ber of sacral foramina in Dr. Lewis's skeleton was only four, 

 whereas in Professor Owen's and Dr. Savage's there were five. 



The sternum is composed of five bony pieces, all in the 

 same line ; the first of which is quadrangular, broadest above, 

 the others very nearly circular. The coracoid bone is entirely 

 unossified with the scapula. Ilium, ischium and os pubis un- 

 united in the acetabulum, though the ischium and os pubis 

 were perfectly co-ossified below the symphysis. The iliac 

 crests ascend as high as the superior face of the third lumbar 

 vertebra, the intervertebral substance being in a dried state. 



Arms. The whole skeleton being extended in a straight 

 line the tips of the longest fingers reached as low as the mid- 

 dle of the tibia. The forearm was about half an inch shorter 

 than the humerus, and the hand and wrist were nearly as 

 long as the radius. The tip of the thumb reached to the 

 distal extremity of the first metacarpal bone. 



Legs. Femur a little longer than the tibia, and the feet 

 almost precisely of the same length as the hands. Thumbs 

 longer than those of hands, and extending as far as the distal 

 termination of the first phalanx of the first toe. 



Anterior extremities from head of humerus to tip of the 

 middle finsfer seventeen inches. Posterior extremities from 

 head of femur to lower face of os calcis, twelve and a half 

 inches. Entire length of skeleton, twenty-seven inches. 



The above skeleton being entirely ligamentous, and the 

 bones not having been in any instance detached from each 

 other, there can be no question as to any error having arisen 

 from this source, as to their number, &c. It will be obvious 

 that the number of vertebrae is greater than in either the 

 skeleton described by Professor Owen, or in that sent to the 

 Society by Dr. Savage. The difference too in Dr. Lewis's 

 skeleton as to the number of sacral foramina, and the number 

 of vertebra?, which articulate with the ilia is also striking. 

 Whether this may be a specific difl^erence or not I will not 

 pretend to say ; if so, these are the only characters wliich I 

 have been able to find, which distinguish it from the Troglo- 

 dytes niger, Geoflf. 



