72 



BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY, 



somatic mesomer.j 

 splanchnic 



nph 'stnv' ^ j 



Figures E-H. 



Four diafframmatic figures illustrating: the similarity in origin of flie fundament of a meso- 

 nephric blastula in Ichthyoplns {E and F) and Amblystoma {G and //). The splanch- 

 noderm of both epimer and lateral mesoderm is shaded with horizontal lines, that of the 

 niesomer (exclusive of the sclerotome, which is indicated by double horizontal lines) 

 •with horizontal dashes. The somatoderm of both epimer and lateral mesoderm is 

 shaded with oblique lines, that of the mesomer with oblique dots and dashes. 



