SEBACEOUS FLUIDS. 59 



so marked, that the glands may be divided into two classes ; 

 viz., those connected with the long hairs of the head, face, 

 chest, axilla, and genital organs, and the coarse, short hairs, 

 and those connected with the fine, downy hairs. A few 

 small simple follicles are found in the parts not provided 

 with hairs. 1 



The glands connected with the larger hair-follicles are 

 of the simple racemose variety, and are from -^ to ^ of an 

 inch in diameter. From two to five of these glands are gen- 

 erally found arranged around the follicle. They discharge 

 their secretion at about the junction of the lower third with 

 the upper two-thirds of the hair-follicle. 2 The follicles of the 

 long hairs of the scalp are generally provided each with a 

 pair of sebaceous glands, measuring from y^-g- to ^ of an 

 inch in diameter. Encircling the hairs of the beard, the 

 chest, axilla, and genital organs, are large glands, some of 

 them JL of an inch in diameter, arranged in groups of from 

 four to eight. 



The glands connected with the follicles of the small, 

 downy hairs, are so large, compared with the hair-follicles, 

 that the latter seem rather as appendages to the glandular 

 structure. These glands are of the compound racemose 

 variety, and present sometimes as many as fifteen culs-de- 

 sac. The largest are found on the nose, the ear, the carun- 

 cula lachrymalis, the penis, and the areola of the nipple, 

 where they measure from -^ to -^ of an inch. The glands 

 connected with the downy hairs of other parts are usually 

 smaller. The glands of Tyson, situated upon the corona of 

 the glans penis and behind, upon the cervix, are sebaceous 

 glands of the compound racemose variety.* 



The minute structure of the sebaceous glands is very 



1 KOLLIKER, Handbuch der Gewebelehre des Mensclien, Leipzig, 1867, S. 146. 



2 SAJPEY, Traite (Tanatomie descriptive, Paris, 1852, tome ii., p. 478. 



3 A very full and satisfactory account of the distribution and general anat- 

 omy of the sebaceous glands is to be found in KOLLIKER, Manual of Human 

 Microscopic Anatomy, London, 1860, p. 135, d seq., and in the later German 

 edition, Leipzig, 1867, S. 146, et seq. 



