80 DR. W. KIDD ON THE [ Feb. 3, 
trunk it passes from cephalic to caudal, and on the limbs from 
proximal to distal extremities in a perfectly uniform manner. 
This arrangement obtains in a great number of long-bodied or 
primitive forms, such as rodents, smaller carnivores, insectivores, 
marsupials, lemurs and lower monkeys. As to the hair-slope in 
the Otter, nothing further requires notice, and the type may be 
looked upon as that of the primitive hairy mammal. 
2) When a Carnivore of a different form, such as a short-bodied 
close-haired Domestic Dog, is investigated, a few departures from 
the primitive type of hair-slope are found. The Dog is taken as 
representing a more highly developed carnivore form, and it 
presents, as do all Canidz possessing sufficiently short hair :— 
(i) A whorl situated at the extremity of the snout with a 
feathered arrangement proceeding from it towards 
the orbits. 
(ii) Reversed bilateral area of hair on the pectoral region. 
(iii) Reversed bilateral area of hair on the ventral surface of 
the abdomen in the inguinal region. 
(iv) Bilateral symmetrical whorl in the gluteal region lying 
exactly over the tubera ischi, and, proceeding towards 
this spot, a reversed area of hair on the extensor 
aspect of the thigh. 
(v) Reversed area of hair on the extensor surface of the 
ulna. 
These have been fully described, and explanations of their 
etiology put forward, in our Proceedings’. 
The Domestic Dog thus presents an advance in several directions 
upon the primitive arrangement of hair in the Otter. 
(3) The Domestic Ox shows certain peculiarities and departures, 
both from the primitive and specialized Carnivore type :— 
(i) In the frontal region a whorl and a feathering which 
proceeds from it towards the level of the external ears, 
terminating here in a crest. 
(ii) Short longitudinal crest or mane, commencing as a tuft 
at the level of the horns. 
(iii) This crest or mane is interrupted abruptly in its normal 
backward course at about the middle of the neck by a 
ridge. At this point there is produced a meeting of 
two streams of hair proceeding in opposite directions, 
and the forward or “abnormal” stream is found to 
commence at a whorl which hes in the median plane 
at about the middle of the dorsal region. 
(iv) From the whorl situated on the dorsal region the slope 
of hair resumes its normal direction and passes to the 
tail, on which it is so arranged that a central longi- 
tudinal crest is usually found, and it terminates in a 
scanty tuft of hair. 
1 Proce. Zool Soc. 1902, vol. 1. pp. 148, 149, 150. 
