OF THE (I LANDS OF THE SKIN. 207 



tinctly enough, though thinner than elsewhere. The same 

 description applies to certain glands of the scrotum, and even of 

 the hack, of the labia major a, of the mons veneris, and of the 

 neighbourhood of the anus; yet with this limitation, that often 

 only a small part of the glandular tube, perhaps merely its 

 csecal extremity, is provided with a muscular coat. The glands 

 of the leg, of the penis, of the thorax (the areola excepted), of 

 the eyelids, and the majority of those of the back and thigh, of 

 the chest and abdomen, as well as of the two prominent 

 segments of the upper extremity, are delicate and without 

 muscles. 



The diameter of the glandular canals varies, in the smaller 

 glands from 0-022 — 0-04'", and is about O03"' on the average; 

 the thickness of the walls, 0*002 — 003"' ; of the epithelium, 

 0-006'"; of the cavity, 0-004 — 0-01'". Among the axillary 

 glands some have canals of 0*07 — 0-1'", even 0-15'", with walls 

 0-006"' in thickness, without the epithelium, the half of which 

 is formed by the muscular layer ; others, and in fact the largest 

 glands, possess canals of 0-03 — 0-06'", with walls of 0-004"'; 

 in the areola and the genitalia, also, the dimensions of the 

 larger glands vary, though within narrower limits. 



All the coils of the sudoriparous glands are penetrated by 

 connective tissue, interspersed with fat cells, which supports 

 the vessels and unites the separate convolutions of the tubes 

 with one another ; some of them have an external fibrous 

 covering investing the whole coil (of common connective tissue 

 with fusiform nuclei), which is particularly well developed in 

 those more isolated coils which are lodged in the subcutaneous 

 cellular tissue (penis, axilla, &c.) 



§ 68. 



Secretion of the sudoriparous Glands. — All the smaller 

 sudoriparous glands contain, as soon as any cavity is apparent 

 in their canals, which, however, is by no means always the 

 case, nothing but a clear, bright fluid, without any formed 

 contents. In the axillary glands, on the other hand, the 

 contents abound in formed particles, and appear either as a 

 greyish, transparent, semi-fluid substance, with innumerable 

 fine, pale granules, and often with solitary nuclei ; or as a 

 whitish-yellow, tolerably viscid matter, with a varying quantity 



