6o 



HYPOPHYSIS-^OVARY -^OVIPOSITOR 



II 



Fig. 51B. Medial sections of 

 the hypophyses of: 



VIII Amiurus, 



IX Zoatces, 



X Xenopus (juvenile), 



XI Xenopus (adult), 



XII Rana, 



XIII Bufo, 



XIV Seps, 

 XV Serinus, 



XVI FeHs. 



axis, the lobus tuberalis in fishes lies against the hypophysial 

 stalk, as, for example, in Amiurus, As a result the lobus 

 anterior takes its place on the cranial side of the body of the 

 hypophysis, e.g., in Zoatces, thereby conforming to the 

 above-mentioned basic design. 



d. Independence of the lobus tubevalisl 

 In Pettomyzon (Fig. 51 A, I) the lobus tuberalis lies as a 

 separate lobe, surrounded by connective tissue, in front of the 

 lobus anterior. In the great majority of bony fishes the lobus 

 tuberalis is directly connected with the lobus anterior, the 

 cells often overlapping one another, although cytological dif- 

 ferences in colour and superficial incisions facilitate identifi- 



