Dr. W. G. HUET. *Notes on the trochlear and oculomoter nuclei and the trochlear root in the lower vertebrates”. 
nuel. Tit 
Fig. 6. Petromyzon fluviatilis. 
rad, Ill 
Fig. 10. Selache naxima. 
connect fold 
nucl, Il 
tectum valvula 
rad, Ill 
Fig, 7. Petromyzon fluviatilis, 
frontal caudal 
rad. V 
Rad, IV 
Nu. IV 
nucl, IV a Nu, IIL 
RR FE ET 
Fig. 11. Sagittal Section through the brain of Tinca tinca 
rad, met. V 
tectum Valy. protusion connect. fold Valv.-tect. 
rad. post. IV 
after decuss 
Com. p. Decuss.R IV 
rad. post. ve | 
beforedecuss nucl, Ill d. 
nucl, Ill va 
Re Ill 
Fig. 9. Sagittal Section through the brain of Scyllium Canicula, 
Fig. 12 Gadus morrhua. 
Proceedings Royal Acad. Amsterdam. Vol. XIIL 
