516 



MR. T. H. BURLEND ON THE UROGENITAL [Mar. 1, 



a duct which opens into the sperm-duct or sperm-vesicle, seven 

 into the former and fifteen into the latter, the posterior ducts 

 delaying their entrance into the sperm-vesicle and so having an 

 oblique course between it and Leydig's gland. 



Structure of Sperm- Vesicles. 



These organs are white and thin-walled in fresh specimens, but 

 the region for about an inch anterior to the constriction is pale 



Text-fiff. 42. 



ur.s. 



Right vesicula seminalis of adult male Chimcera opened from the ventral side. 



o. White thin- walled region with horizontal partitions. 



6. Pale green region traversed by a honeycomb network of partitions. 



c. Posterior white thick-walled region. 



sp.d.,' lower end of left vesicula seminalis ; sp.d'.o., opening of sp.d.' into ur.s. ; 



ur.o., opening into ur.s. of the ureters from the left side ; ur.s., urogenital 



sinus cut open. 



