'82 



ANATOMY OF VERTEBRATES, 



gland subdividing it, or defining its lobes ; and which, from their 

 connection with the tegument, are called ' suspensory ' ligaments. 

 Finer processes connect the opposite surface or base of the gland 



611 



From a Cooperian preparation of the sclerous framework and attachments of the Human mammary gland. 

 A bristle is passed behind some of the straight or terminal lactiferous ducts, cclxxxiv". 



with the fascia of the pectoral muscle, b, b. The nipple in the 

 virgin is a rounded cone and nearly smooth ; at sixteen years 

 it is slightly wrinkled ; at seventeen it has small papillae upon 

 its surface ; from twenty to forty years the papillae are large ; 



from forty to fifty the nip- 

 ple becomes wrinkled; from 

 fifty to sixty the nipple is 

 elongated ; and in old age 

 it usually has a warty ap- 

 pearance. When in use 

 its extremity expands and 

 shows the circularly dis- 

 posed conspicuous pores of 

 the lacteal ducts. The pa- 

 pillae of the nipple, fig. 612, 

 are directed toward its apex. 

 The coloured portion of 

 skin around the base of the 

 nipple is the ' areola : ' it 

 expands and changes from 

 a reddish colour to a dark 

 brown, after impregnation. Around the base of the nipple are 

 orifices of complex sebaceous glands. The skin of the areola is 

 covered with papillae, like those of the nipple, but of smaller size ; 

 they are disposed in circles, directed toward the nipple, so that 



Sensitive papilla) of the Human nipple and areola ; nat. 

 size, cclxxxiv". 



