266 



Rabl^) and Hoffmann"^), arises as a longitudinal anastomosis bet- 

 ween intersegmental arteries. This mesonephric part then joins with 

 the caudal as shown in Fig. 3. Near the posterior end of the Wolffian 



VVe 



Ao. 





VC. mj^ ¥ 



.■V.Ve. 



Ao. 



■V.Ve 



o 



.Ä^*^ 



Ao 



VSc 



O ^^ AM 



c 



Fig. 5. Cross Sections of the Wolffian body. A. Torpedo, 19.2 mm, H.E.C. 682, 

 Sect. 584—588, X ^0 diams. B. Eabbit, 6.6 mm, 12V2 days, H.E.C. 460, Sect. 137 

 —139, X 80 diams. C, Torpedo, 27.8 mm, H. C. E. 671, Sect. 715, X 50 diams. 

 D. Eabbit, 11.0 mm, 14 days, X 50 diams. A.M. Mesonephric artery. Ao. Aorta. 

 Gl. Glomerulus. V. .4. Mesonephric azygos vein. V. a. a temporary azygos vein. 

 V.C. Posterior cardinal vein. V.Sc. Subcardinal vein. V.Ve. Vertebral vein. 



1) C. Rabl, Ueber die Entwickelung des Venensystems der Se- 

 lachier. Festschr. f. Leuckart, 1892, p. 230. 



2) C. K. Hoffmann, Zur Entwickelungsgeschichte des Venensystema 

 bei den Selachiern. Morphol. Jahrb., Bd. 20, 1893, p. 299. 



