Geo. S. Huntington ~ 175 
Fig. 2. Phylogenetic Schema of muscular variation. 
Fic. 3. Hapale jacchus. Common Marmoset. Dissection of Pectoral mus- 
eles. Columbia University Museum, No. 427. 
Fria. 4. Nycticebus tardigradus. Slow Lemur. Dissection of Pectoral mus- 
eles. Columbia University Museum, No. 1068. 
Fie. 5. Macacus cynomolgus. Kra monkey. Dissection of Pectoral muscles 
with variant supernumerary axillary slips. Columbia University Muse- 
um, No. 1132a. 
Fic. 6. Cynocephalus anubis. Olive Baboon. Dissection of the Pectoral 
muscles. Columbia University Museum, No. 1243. 
Fic. 7. Macacus melanotus. Dissection of Pectoral muscles. Columbia 
University Museum, No. 1871. 
Fic. 8. Semnopithecus entellus. Dissection of Pectoral muscles. Columbia 
University Museum, No. 1251. 
Hie. 9. Simia satyrus, Orang. Superficial dissection of right pectoral 
region. From a fresh specimen. 
Fic. 10. Simia satyrus, Orang. Deep dissection of right pectoral region. 
From a fresh specimen. 
Fie. 11. Diagram illustrating the phylogeny of the supracondyloid for- 
amen in vertebrates, the red line indicating its distribution in the series. 
i 
