794 



THE APPAR 'ATI'S OF THE ,S/-:.V.s7-:> 



Fig. 365. 



of an inch in width at their base. Tho nervous papilla} are the 

 organs of touch, and contain either tho corpuscula tactus (or axile bodies) of 

 Meissnor or of Kraiise. 



The SEBACEOUS GLANDS 

 lie beside the hair folli< 1<^. 

 each hair being flanked by 

 two glands. These small 

 organs are composed of a 

 very granular epithelium, and 

 are usually oval in shape. 

 (They are imbedded in the 

 substance of the derma, and 

 present every degree of com- 

 plexity, from the simplest 

 follicle to the compound 

 lobulated gland. In some 

 situations, their excretory 

 ducts open independently on 

 the surface of the epidermis. 

 Those associated with the 

 hairs are raceiform and lobu- 

 lated, consisting of glandular 

 vesicles, which open by short 



TACTILE PAPILLA FROM THE SKIN, SHOWING THE pedunculatcd tubuli illtO a 



tactile corpuscles, OR " AXILE BODIES." common excretory duct, and 



A, In the natural state ; , Treated with acetic acid. the latter, after a short COUTSO, 



into the hair follicle. In some 



parts the ducts are short and straight ; in others, where the skin is thick, they 

 are spiral. They are lined by an inversion of the epidermis, which forms a 

 thick and funnel-shaped cone at its commencement, but soon becomes soft 

 and uniform. Sebaceous glands are met with in all parts of the body, but 

 are most abundant in those parts which are naturally exposed to the influence 



of friction, or require to be supple. Miiller 

 found in the Pig a special cutaneous gland, 

 somewhat resembling the sebaceous glands. 

 It is situated on the inner and posterior aspect 

 of the knee, and is from ^ths to 2 inches in 

 length, and from J to ^ inch in width. In the 

 Sheep, there is found in the skin between the 

 claws, a particular inversion of the integument 

 that forms a small elongated pouch, curving 

 upwards and terminating in a cul-de-sac. This 

 is the interungulate gland, sinus, or bijlex canal 

 (sinus cutaneus ungularuin) ; it secretes a viscid 

 matter from glands which, according to Kivu 

 lani, are analogous to the sebaceous glands. 

 The pouch is lined with very fine hairs.) 

 Tho SUDORIPABOUS GLANDS are deeper situ- 



a,InneVaVp^ C t"of"fir8t"phalanx;~6', atcd than tho last (P*wing even into the 

 Hoof, or claw ; c, Interungulate subcutaneous areolar tissue, where they are 

 gland ; d, Orifice of its duct. surrounded by adipose cells). They consist 



of a convoluted tube (or several tubuli pro- 

 duced by dichotomous subdivision) imboddcd in the reticular layer of the 



INTERUNGULATE GLAND OF SHEEP. 



