EXPERIMENTAL FISH EMBRYOLOGY 



395 



Fig. A and B. Maps showing position of 

 areas for prospective tissues in the early 

 gastrulae of Fundulus (A) and Salmo (B) . 



Endoderra, light stipple; notochord, heavy 

 stipple; prechordal plate, cross-hatching; 

 nervous system, vertical sliading; mesoderm, 

 horizontal shading. Fig. A after Oppenheimer, 

 1936; Fig. B simplified after Pasteels, 1936. 

 Drawn by Rosemary Gilmartin. 



(From Oppenheimer 19'+7-' 

 Quart. Rev. Biol. 22:105) 



MORPHOGENETIC MOVEMENTS IN THE BLASTULA AND EARLY 

 6ASTRULA OF THE TROUT AS DETERMINED BY VITAL DYES 



rtepartition des territoires 

 de la blastula vue de haut 

 et de profil. Pf^intille 

 dense, chorde; pointiile 

 espace, plaque prechordals 

 et entoderrae; croix, lames 

 laterales. Systeme nerveux 

 et ectoderme en blanc. line 

 ligne Interrompue separe le 

 materiel neural cephalique 

 du troncal. 



Mouveraents morphogenetlques 

 a divers stades de la forma- 

 tion de I'embryon. A gauche, 

 feuillet profond (fleches 

 brisees) . A droite, feuillet 

 superficiel (fleches pleines) . 

 Le fin trait continu represente 

 les formes exterieures de 

 I'embryon; le trait interrompu, 

 la liraite d' invagination. 



(From Pasteels 195^: Comp. rendu. I'Assoc. des Anat., Bruxelles) 



