PLATE 5 
EXPLANATION OF FIGURES 
21 Acanthias, 8 em. Transverse section somewhat behind figure 20. Same 
series. 
22 Acanthias, 8 em. Transverse section at the foramen monroi. Same 
series. 
23 Acanthias, 8 em. Transverse section through the posterior part of the 
pallium. 
450 
