Williams. — Eye of Flounder. 



PLATE 2. I 



{Pseudopleuronectes americanus.) 



Fig. 8. Brain offish 75 millimetres long, dorsal view. X 8. 



NoTK. — ob. inf. should have been oil. inf. 

 Fig. 9. Same brain viewed from right side. X 8. 



Note. — ob. sv. should have been obi. xu. • 



Fig. 10. Facial cartilages of fish of Stage II. as seen from above. X 100. 



Note — Meckel's cartilage does not extend as far caudad as the letter- 

 ing, crt. mk. dx., which is placed opposite the quadrate-hyomandibular 

 mass. 

 Fig. 11. Dorsal view of brain, transposed eye and cranial nerves of adult. From 



a dissection. X 2. 

 Fig. 12. Chiasma of a fish at Stage I. seen from in front. X 760. 



