Fig. 6. Vasa efferentia of a malo embryo of Scyllium canicula eigbt 

 centimetres in length. Zeiss a a, ocul. 2. 



There are seen to be at the least six and possibly seven distinct vasa 

 going to as many segments of the WolflSan body and connected with a 

 longitudinal canal in the base of the testis. They were probably also 

 connected with a longitudinal canal in the Wolffian body, but this could 

 not be clearly made out. 



Fi(f. 7. The anterior four vasa efferentia of a nearly ripe embryo. Con- 

 nected with the foremost one is seen a body wliich looks like the remnant 

 of a segmental tube and its opening (r. st ]). 



Fig. 8. Testis and anterior part of Wolffian body of an embryo of 

 Squatina vulgaris. 



The figure is intended to illustrate the arrangement of the vasa efferentia. 

 There are five of these connected with a longitudinal canal in the base of 

 the testis, and with another longitudinal canal in the Wolffian body. From 

 the second longitudinal canal there pass off four ducts to as many Malpighian 

 bodies. Through the Malpighian bodies these ducts are continuous wath the 

 several coils of the Wolffian body, and so eventually with the Wolffian duct. 

 Close to the hindermost vas efferens is seen a body which resembles a 

 rudimentary segmental tube (r. st. 1). 



