STKUCTU11E OF GLANDS. 



249 



like the horns of a deer (G), or in the guise of a pair of 

 long shaped canals ending in many smaller saccules, or form- 

 ing a tuft or corymb of blind canals (H), or a cluster of 

 vesicles connected like a bunch of grapes or berries to a com- 

 mon duct (A, N). 



b 



Fig. 250. Two sudoriparous 

 glands after Gurlt, Mayaz. f. d. 

 gesammte Thierheilk. 1835, Tab. 

 2, fig. 1. a, epidermis ; b, tactile 

 papillae ; c, corium ; d, adipose 

 tissue ; e, sudoriparous glands. 



Fig. 251. A thin layer from 

 the scalp of the human subject. 

 a, a, sebaceous glands ; 6, a hair 

 with its follicle, c. After Gurlt, 

 Mag. f. d. gesam. Thierheil- 

 kunde, 1835. 



The varieties in form presented by the seminal organs or 

 testicles are still greater, new inquiries constantly offering new 

 shapes to our notice. From the simple, linear and filiform 

 canal of Julus (fig. 253), to the highly complicated yet beau- 

 tiful appearance, comparable to a leafy tree laden with fruit, 

 which we observe in Silpha obscura (fig. 253, 10), there are 

 forms of every intermediate degree of complexity, but always 

 as varieties of the same elementary type. Even the simple 

 canalicular or sacculate form presents numerous variations. 

 In one case it is the straight pretty regular canal already indi- 

 cated (1) ; in another the canal is irregular, of different thick- 



