Wituiams. — Eye of Flounder. 
Fig. 22. 
Fig. 28. 
Fig. 24. 
Fig. 25. 
PLATE 5. 
( Pseudopleuronectes americanus. ) 
Diagram of parasagittal section of tectum. X 67. 
Portion of a parasagittal section of tectum from the anterior part of the 
optic ventricle to the surface. X 228. 
Cross section of optic nerve.  X 50. 
Parasagittal section of diencephalon and part of metencephalon. X 18. 
4 fg) 
1 
M¢ 
