Dorsal membrane 

 Spinal cord 



Wolffian ducts 



Yolk 



FIG. 2.1 



through nor 

 s'derable d:r 

 Compare wi 

 tei ior part o 

 under PI. 1. 



ruimcrse section 



l>ryo, a con- 



i of the vent. 



i. on by pos- 



: references 



Muscle segments 

 Aorta 



Notochord 

 Dorsal membrane 

 Spinal cord 



..Wolffian duct 



Intestine 



Yolk 



FK;. 27. Transverse section corresponding wi 

 but through a double monster of the type illusn. 

 PI. II. fig. 10. Figs. 28, 29, and 31 are fro; 

 series. At this level the two intestinal canals are 

 separated. For relations of Wolffian ducts, etc., set.- pp". 

 22. 23 and I'!. XIX. figs 76-79. (xr.|.) 



Dorsal membrane 



Spinal cord 



Notochord 



Aorta . . . 



Wolffian body ..;. 



Wolffian ducts.--' 

 Rectum 



Pelvic fin.... 



.. Notochord 

 Spinal cord 



Dorsal membrane 

 - Aorta 



Wolffian ducts (right 



and left) 



Mesentery (double) 

 Rectum 

 Pelvic fin 



FlC. 35. --Trim*" 

 frig. 34, but a little furlh 

 Compare wtth Fig. 28 (unio 

 terior part of body). Other < 

 under PI. I. fig. i. (.14.) 



by pos- 

 Vrences 





a in Fig. 97, but a thtlr furttw- \a<\ in ihr .--. 1 1,,. 



intc<line is ii '. Irh.in 



.tl ducts HC' c(;?iinii; tr.^riiifr U) their inner, or 

 adjacent. >ide. C'ompjirt- with Fig. 25 (normal). Other 

 reference* under Fig. 27. (xi.f.) 



Muscle segments 

 Spinal cord . 



Notochord - 



Aorta 

 Caudal vein 



Bladder 

 Rectum . 

 Ventral membrane 



Flo. at. Transverse section, as in 

 the two preceding figures, but passing 

 just in front ol the vent. The Wolffian 

 ducts ha\e opemil into the bladder, 

 which is seen lying dorsal to the 

 rectum. Compart (union 



by posterior [xirt 



.......... Notochord 



Spinal cord 

 .Dorsal membrane 

 Aorta 



Wolffian ducts 

 1 Bladder 



Mesentery 



Rectum 



Ventral membrane 



references under I'l. I. fig. 



I > 



FIG. 29.- Transfers*- section through 

 sler as in Figs. 27 und 28, but fv 

 Compare with Fig. 26 (norh 

 ducts have opened into a first 

 have not yet reached t'n 

 the other. These relations a 

 references uiiiln : 





J. F. G. 



PL 



VI. 



VI 



