CHELONIA 217 



"relationship between the turtles and the plesiosaurs has therefore been 

 based, in large part, on misconceptions, and the animals do not have the 

 structures on which the greater claims for affinity have rested." 



1909 



Hay (35) furnished a description and illustration of Toxochelys 

 stenopora from a specimen in the U. S. National Museum. The most 

 important parts are the epiplastra and the entoplastron, seen for the 

 first time. Heritsch (36) described and figured the plastron of a young 

 Trionyx petersi. In another paper (37) he announced four new species 

 of the same genus from the Tertiary of Steiermark. Loomis (10) an- 

 nounced having found important additional materials of Testudo areni- 

 vaga Hay and of two new species, T. hrevisterna and undabunda, all from 

 the Harrison beds of N'ebraska and Wyoming. Palmer (35) described 

 Psephophorus calvertensis, found in the Miocene of Maryland. Wieland 

 (10) revised the group of protostegid turtles. He adopted Baur's super- 

 family Chelonioidea, and entered under this the Cheloniidae, Protoste- 

 gidse, Desmatochelyid^e, Toxochelyidae, and Dermatochelyidse. The new 

 species Protostega copei was described. He furnished three plates for 

 the illustration of the great turtle Arclielon ischyros, mounted at Yale. 



1910 



Hay (35) furnished descriptions of eight new species of turtles which 

 had been discovered at various places west of the one-hundredth merid- 

 ian. These are in the U. S. National Museum. Compsemys was shown 

 to belong in the superfamily Amphichelydia, and probably with the 

 Baenidae. Watson (22) referred Thalassemys rutimeyeri to the genus 

 Glyptops. 



1911 



Ammon (50) treats of the turtles of the Braunkohlenton of the Upper 

 Miocene of Eegenslnirg, Bavaria, descril)ing and illustrating witli excel- 

 lent figures the new species Trionyx brunhuberi and Clemmys sophicv. 

 Broili (46) presented a general account of the Testudinata. Follow- 

 ing Siebenrock, 1909, he divided the order into four superfamilies — 

 Cryptodira, Cheloniidea, Pleurodira, and Trionychoidea. The x4mphi- 

 chelydia are included in the Pleurodira and the Dermochelyidae in the 

 Cheloniidea. Jaekel (Die Wirbelthiere) removed the Testudinata from 

 the true Reptilia and placed them in the Paratheria, a class containing 

 also the Therapsida, the Anomodontia, and the Monotremata. He ac- 

 cepted the group Amphichelydia, erected the sea turtles into a distinct 



