1903.] HAIR-SLOPE IN MAMMALS. 83 
List I. 
Orrur:).252 No modifications of primitive type of hair-slope. 
DOG sees 2 whorls &e. 
3 reversed areas of hair. 
Oixis... Siasae 2 whorls &e. 
Tuft and small mane. 
Crest and tuft on tail. 
Horse 3 whorls &e. 
Tuft. 
Constant. 
Mane. 
Bushy tail. 
4 whorls &e. Occasional. 
List II. 
[aaa te l 7 yer aR 
a | 
| | Departures | Eton of | 
| from Primitive t o vd) .| Envtronments. | Habits 
iBadie-slope.. eee » adaptive or | 
| OOEN Ge | non-adaptive. 
(eee ce ae es | 
\Orrer.... None. All adaptive. Homogeneous. | Simple. 
| 
as peta | 5 | All non-adaptive.) More varied. More varied. 
| 
}Oistewsas: _4constant, several 1 non-adaptive. | Still more varied. Still more varied. 
| occasional. 3 adaptive. | 
| 
| 
| Non-adaptive. 
| | | 
Horse. | 6 constant, 4 oc-) 3 non-adaptive. | Most varied of | Complex, © com- 
| casional. | 3 adaptive. the four types. | bining the habits 
of its wild life 
{ | Non-adaptive. | with those of 
| domestication. 
List IIT. 
Observations as to use of External Kars, Panniculus 
Carnosus, and Tail in Ox and Horse. 
OxeEN flapped external ears at the rate of...... 684, 816,840 times 
an hour, 
In OXEN panniculus acted at the rate of ...... 984 times an hour. 
OxeEn flicked tails at the rate of ............... 348, 468, 504, 540, 
720, 780, 1082 
times an hour. 
Horsk flicked tail at the rate of ............ ,.. 1108timesan hour. 
