FORMATION OF GERMINAL LAYERS IN CHELONIA. 243 



of Reptilia harmonises completely with that of Amphibia. Our 

 observations confirm the conclusions which Hertwig formed in 

 regard to the Reptilian development, basing his judgment on the 

 observations of other workers (No. 6, Theil ii), but we hope we have 

 filled in many details not before noticed. We dissent strongly from 

 Strahl, who in two separate publications (Nos. 11 and 13) oppose 

 Ilertwig's views. We think Strahl is singularly unfortunate in the 

 interpretation of his sections. 



We think it hardly necessary to go over other papers on the 

 germinal layers of Reptilia (Strahl, Nos. 7, 8, 9, 10, 11, 12, IS; 

 KuptFer, No. 5; Weldon, No. 14; Hoffj;nann, No. 16), and point out 

 the points of similarity and dissimilarity between those workers and 

 ourselves. The reader must refer to the original papers themselves. 



We conclude, expressing the hope that our investigations will 

 furnish a necessary intermediate step in establishing firmly the views 

 of Balfour and Hertwig in higher Vertebrates. 



