THE GLANDS. 247 



of the wild reindeer from Norway, are at the cleft two inches 

 long and are two inches and six lines broad, and measure around 

 the curved edge three inches and six lines. The accessory hoof 

 is one inch and nine lines long, and one inch and six lines broad. 

 The accessory carpal bone is two inches and six lines long. 

 This hoof corresponds in shape with that of our Woodland Car- 

 ibou, with which the deer is specifically identical, and is of about 

 the same proportionate size. I regret that I have no specimens 

 of the Woodland Caribou from the northwest, where it reaches 

 the frozen ocean west of the Mackenzie River, nor have I reliable 

 information as to the size of this animal in that region. 



I have already shown that there is no marked peculiarity about 

 the forms of the feet of the other species of our deer, nor is the 

 distinction between them very marked. I have spent much time 

 in examining their tracks in light snows, and could generally dis- 

 tinguish the track of the mule deer by its being longer and slim- 

 mer than the other ; but even as to this, I was sometimes in doubt, 

 except in the cases of fully adult specimens, the feet of which are 

 larger than the feet of the largest Virginia deer. 



When compared with that of any other quadrupeds, the track 

 of the smaller deer is readily distinguishable. Its narrow heel 

 and sharp points — its length in proportion to its breadth and 

 graceful outside curvature, can never leave a doubt of the iden- 

 tity of the track of a deer. It can never be mistaken for the 

 track of the sheep, the goat, or the antelope. 



The white fugitive marking around the feet of the Virginia 

 Deer, and its absence on all the others, except the caribou, has 

 been explained in another place. 



THE GLANDS. 



From necessity the naturalist must ever be in search for pe- 

 culiarities in organized beings which will enable him satisfac- 

 torily to separate them into divisions, orders, genera, and species, 

 and it is not remarkable that some more than others should at- 

 tach importance to peculiar characteristics. 



On the 28tli of June, 1836, Dr. Gray made some observations 

 before the Zoological Society of London — see its proceedings of 

 that date — " On the tufts of hair observable on the posterior 

 legs of animals of the genus Cervus, as a characteristic of that 

 group and a means of subdividing it into natural sections." 



These tufts are found on the inside or the outside, or sometimes 

 on both sides of the hinder legs of all the deer which Dr. Gray 



