328 



G. B. Wieland — On Marine Turtles. 



closer relationship to stocks ancestral to the Trionychidse, and 

 that there are many most suggestive indications that indepen- 





Figure 1. — Carapace of Toxochelys Bauri Wieland, x 3^ nearly. (Drawn 

 from type.) N, Nuchal ; 2, 4, 6, 8, Neuralia ; 9', posterior segment of the 

 9th or post-neural element of the median series ; A, Antero-pygal ; P, Pos- 

 tero-pygal ; M, Marginalo-pygal ; I- VIII, the Pleuralia ; M10, 10th (rib- 

 free) Marginal; /, the post-nuchal foramina; f 1 , ,/ 8 , 1st and 8th pleuro- 

 marginal fontanelles. The three Epi-neurals are not lettered. 



dent marine races of Testudinates, of which at least a half 

 dozen may be enumerated, have been repeatedly developed 

 ever since the Jurassic. 



