518 



MR. T. H. BURLEND ON THE UROGENITAL 



[Mar. 1, 



longer coiled. The latter contains free spermatozoa which fill 

 the entire lumen and yet are not massed together into bundles 

 (spermatophores) (text-fig. 44). 



Text-fig. 43. 



sp.d. 



h^dJl 



sp.d. 



Transverse section of Leydig's gland and duct in region I of text-fig. 41. 



i.s., coils of Leydig's gland cut across; m.s.', duct connecting Leydig's gland with 

 sperm-duct ; sp.d., coils of sperm-duct, filled with spermatozoa, cut across. 



Text-fig. 44. 



sp.d. 



m.s. 



m.s 



Transverse section of Leydig's gland and duct in region II of text-fig. 41. 

 (Lettering as in text-fig. 43.) 



In region III of text-fig. 41 or region a of text-fig. 42 the 

 horizontal partitions (par. in text-fig. 45) are cut rather obliquely, 

 and the spaces between are occupied by spermatozoa aggregated 

 apparently into spermatophores, with a sparse admixture of the 

 secretion from Leydig's gland. In the passage (sp.) along the 

 dorsal middle line of the cavity, the spermatozoa are free and in 

 the condition found in the sperm-duct. 



A section across the sperm-vesicle in region TV of , text-fig. 41 

 or region b of text-fig. 42 presents the structure indicated in text- 

 fig. 46 (p. 520). The spaces in the honeycomb of partitions contain 

 widely separated spermatozoa floating freely in a fluid which is 

 derived from Leydig's gland, and is pale green in fresh specimens. 

 In the dorsal region is the structure ax. — a continuation of the 

 passage sp. above — containing small channels with one or other 



