^8 PROCEEDINGS OF THE ACADEMY OF [1888. 



star on the breast while the remainder of the bodies are dark are 

 objects of common observation. It cannot be an accidental circum- 

 stance that animals that are nearly hairless retain sparse clumps in 

 the same localities. Rhinoceros lasiotis is hairless except at the tip 

 of the tail, the dorsal surfaces of the feet and the tips of the ears. 

 Rhinoceros indicus shows the same peculiarities to a less marked 

 extent. In Elephas the tip of tail is similarly furnished. In the 

 Mexican variety of the so-called hairless dog the same regions named 

 in Rhinoceros are alone hairy. In another variety the breast is 

 furnished with an abundant growth of hair. Men, who are more 

 than usually hairy, yet who do not belong to the grouj) of univei'sal 

 hypertrichosis, possess hair on the pectoral region, and are apt to 

 have a sparse growth of hair at the upper margin of the auricle and 

 a similar but separate line of hair along the posterior border, as well 

 as a patch on the loin or near the coccyx in the median line of the 

 trunk. 



It may be said that the regions named tend to behave differently 

 from the prevailing disposition in hair-nutrition. In breaking from 

 a uniform color these regions present a contrasted color, and the 

 same regions tend to retain hair which elsewhere for the most part 

 is lost. 



But it must be acknowledged that in animals which are for the 

 most part hairless, clumps are seen which do not belong to the above 

 category. These are discussed under other heads. See hair at junc- 

 tion of limbs to trunk, (p. 94) hairs on dorsal line (p. 89) hair at nerve 

 ■ends. (p. 98) 



2. Bkindles. — In some animals the break from the prevalent 

 color assumes another disposition of a widely spread character. I 

 allude to the plan by which the entire pelt is covered by alternations 

 of black with brown or chestnut : these embrace the "brindles." The 

 wolf (Cams lujyus) is often a brindle. Many varieties of dogs e. g. 

 some of the mastiffs and bull dogs are brindles. It is often seen in 

 the female of the domestic cat. The prevalent color remaining black 

 the break is seen in dogs to take place to "tan" and to be localized 

 to the feet to the supra-orbital hair clumps and to the hairy wart on 

 the side of the face. The prevalent color being white, black sjiots 

 are apt to have "tan" margins as is well seen in the fox terrier. 



3. The regions in which Color-Marks are found reg- 

 ularly DISPOSED. — I will now treat of the manner in which the 

 color of a hue which is contrasted to the prevalent color is apt to 

 occur along definite lines or regions of the body. 



