G. JR. Wieland — On Marine Turtles. 



333 



Dermoehelys than for the Chelcmiidse, and that its correctness 

 would not necessarily leave Dermoehelys the most primitive 

 of turtles, but rather the most specialized, as hitherto held by 

 Baur, Dollo, and the writer. As stated, only new fossil evi- 

 dence can settle the very interesting questions that here arise. 



Figure 5. — Carapace of Lytoloma angusta from, trie Upper Cretaceous 

 Greensand of Barnsboro, Gloucester Co., New Jersey. E, E, E, Epi-mar- 

 ginals respectively borne by the right 4th and 5th, 5th and 6th, and the left 

 4th and 5th marginalia. (Enough marginals are present in the original spe- 

 cimen — No. 625 of the Yale Collection — to determine that no further epi- 

 marginals accompanied these three, unless such were borne anteriorly to the 

 4th marginals.) Epi-marginals are not always present in L. angusta. 



The pygal region. — The neural series of Toxochelys JBcturi, 

 excluding of course the epi-neural ossicles, agrees with that of 

 IlardeUa thurgi (1) in having ten elements, in the neural row, 

 — in reality an interpolated element between the normal or 



