86 PROCEEDINGS OF THE ACADEMY OF [1888. 



side of the trunk is associated with the naked trunk surfaces of birds, 

 and the colored area in Indris brevicaudatus. (See infra.') 



In men who are notably hairy (the cases of universal hyper- 

 trichosis are not here included) the hair is chiefly deveh:)ped on the 

 breast and the anterior wall of the abdomen at its upper part,-on the 

 region over the trapezius muscle near the scapula- and on the lower 

 part of the loin and the shoulder. In a number of examinations I 

 have made of hirsute men, I have never found the teeth defective 

 unless a disposition to universal hypertrichosis was present. This 

 disposition is shown (in addition to the dental defect) by great shag- 

 giness and looseness of contour of the eye-brows. They meet across 

 the inter-orbital space and straggle off" toward the temjioral side of 

 the forehead. The best marked of the naked places of the body in 

 the hirsute men are the forehead, and the side of the trunk. Eschricht 

 mentions having found but a single example of the trunk being 

 naked at the side. His observations appear to have been made in 

 Copenhagen and may perhaps exhibit a national peculiarity. In 

 America I am sure such naked places are frequently seen. I can 

 confirm Eshricht's statement that hirsute individuals usually have 

 black hair, are of stalwart build and do not of necessity have strong 

 beards or more than ordinary growths from the head. 



An instructive analogy can be detected to exist between the na- 

 ked surfaces on the sides of the trunk and the great lateral feather- 

 less spaces (apterylia) of most birds. Above I have invited atten- 

 tion to the fact that in Indris brevicaudatus^ the side of the trunk 

 possesses hair of a different color from that covering the ventre or 

 the dorsum. 



The literature of the subject of color-marks is scanty. The papers 

 here given in abstract are of importance. 



Th. Eimer^ believes the striped forms of the mammalia antedated 

 the spotted, and the retention of color obey phylogenetic laws. He 

 traces the markings of Viverra through the varieties of the genus 

 Canis. Faint traces of the transverse marks of Hyena can be detec- 

 ted in the wolf The black spot at the root of the tail is mentioned 

 as occurring in all dogs. The presence of a dorsal stripe is mentioned 

 as being commonly present. In vertebrates generally the posterior 

 parts of the body is more strongly marked than the anterior. This 

 is evident in mammals though less marked than in the lower classes. 



^ American Museum of Natural History at New Vorl<, No. 260. 

 2 Zool. Anzeiger 1882, V. 685; 1883, 690. 



