904 



THE SENSE ORGANS AND COMMON INTEGUMENT OF THE DOG 



at the distal end of the corresponding second phalanx. The pads have a basis of 

 fibro-elastic tissue and fat, which is intimately adherent to the skin and is connected 

 by trabecute with the bones and tendons. The epidermis is thick and largely 

 keratinized, and is studded with numerous rounded papillae which are readily seen 



Fig. 723. — Pads of Right Fore Paw of Dog. 



Fig. 724. — Pads of Right Hind Paw of Dog. 



1-5, Digital pads; G, 6, metacarpal and metatarsal pads; 7, carpal pad. 



with the naked ej'e. The corium has large papillae, and contains sweat glands and 

 lamellar corpuscles. 



The claws (Ungues) correspond in form to the ungual part of the distal pha- 

 langes, which they enclose. The horn of the claw consists of a body or wall and a 

 sole. The former is strongly curved in both directions, and is compressed laterally. 



Fig. 725. — Half of Claw of Dog; Inner Surface. 



Coronary part; b, volar part of wall; c, sole; d, section of c; c', section of wall; i, coronary border; ^, apex; 

 S, dorsal surface. (From Leisering's Atlas.) 



Its coronary border fits into the depression under the bony collar or ungual crest 

 of the third phalanx and is covered by skin. The lateral borders converge and 

 enclose the sole anteriorly. The corium presents a coronary part which bears 

 papillae only near the coronary border. On the dorsal surface it is thickened to 

 form a ridge, and the corresponding part of the horny covering is thick and main- 



