SECT. 68.] SUDORIPAROUS GLA.NDS. I 25 



The sudoriparous glands generally lie in the meshes of the 

 reticular part of the corium, at a greater or lesser depth, sur- 

 rounded by fat and loose connective tissue, alongside or beneath 

 the hair- follicles. More rarely they are met with in or on the 

 boundary of the subcutaneous areolar tissue, as, for example, in 

 the axilla, the areola of the mamma in part, the eyelids, the penis, 

 and scrotum, the palm of the hand, and sole of the foot. In the 

 two last-mentioned places they are arranged in rows under the 

 ridges of the corium, and at tolerably equal distances from each 

 other ; in other regions they are, for the most part, regularly met 

 with either singly or in pairs, seated in an interstice of the corium ; 

 still, according to Krause, there are parts of the surface measuring 

 \ to -\ of a line in extent, where they are wholly absent or occur 

 closely together in groups of threes or fours. In the arm-pit, the 

 glands form a continuous layer under the corium. 



According to Krause, there are from 400 to 500 glands on a square inch of 

 skin, upon the dorsal surface of the trunk, on the cheeks, and the first two 

 segments of the lower extremities ; 924 to 1090 on the anterior aspect of the 

 trunk and neck, on the forehead, the fore-arm, and on the back of the hand 

 and foot ; on the sole of the foot 2685, and on the palm of the hand 2736. 

 The total number of the sudoriparous glands, without including those of the 

 arm-pit, is approximatively estimated by Krause at 2,381,248, which is pro- 

 bably rather over than under .the truth ; and their entire volume, inclusive 

 of those of axilla, at 39*653 cubic inches. 



The vessels of the sudoriparous glands (fig. 54, c.) can be parti- 

 cularly well seen on those of the arm-pit. On the others, also, 

 vessels are here and there to be seen (most evidently on the 

 penis, where glands of o # 36'" are supplied by beautiful ramifications 

 of an artery of o - o6'" distributed in their interior), and in suc- 

 cessful injections of the skin the glands appear as reddish bodies. 

 Nerves have not hitherto been found upon them. 



§ 68. Intimate Structure of the Glandular Coil. — The sudoriparous 

 glands consist, as a rule, of a single much-convoluted canal (in one 

 case, according to Krause, f " long), rolled up into a ball, and 

 possessing nearly the same width throughout its entire course, 

 which terminates either on the surface of the ball or in its in- 

 terior, in the form of a slightly swollen cul-de-sac. It is only in 

 the large glands of the arm-pit that the canal is divided into 

 branches, dichotomously, which again divide — in rare cases even 

 anastomose — and then, after giving off small caecal pouches, ter- 

 minate, each separately, in a blind extremity. 



The canals of the glands have either thick or thin walls. The 



