?66 



FOSSIL TURTLES OF NORTH AMERICA. 



Professor Cope in 1899 ( [our. Phila. Acad., XI, p. 196, plate xix, fig. 1) described and 

 figured a box-tortoise which he called Toxaspis anguillulatus. Of this tortoise he had at com- 

 mand five fragmentary carapaces on beds of" matrix, three parts of plastrons, and two moulds 

 of" carapaces. All these had been obtained in the cave near Port Kennedy. 



The type of Cope's Toxaspis anguillulatus is number 155 of the collection of the Philadel- 

 phia Academy. This is figured as cited in the synonymy at the head of this article; but the 

 figure is poorly printed and does not well show the structure. A diagram of the specimen 



(fig. 469) is here presented; but even in the specimen some 

 sutures are obscure and on the left side the hinder peripherals 

 have been somewhat displaced. 



Professor Cope did not compare his species with the one 

 which he had described in 1869. The present writer, having 

 examined Cope's types of both species, concludes that they are 

 identical. Cope stated that his type carapace, No. 155, is of 

 larger size than that of any of the existing species of" what he 

 called the Terrapemd;e. However, a comparison with a shell 

 of T . Carolina shows that the carapace was not more than 140 

 mm. long, perhaps not more than 130 mm.; and occasional 

 individuals of T . Carolina attain that size, while some of T. 

 major become still larger. Cope believed that his T. anguil- 

 lulatus had a more deprest shell than any of the living species, but this may be doubted. 



Another of Cope's specimens is numbered 154. This (fig. 470) furnishes the three anterior 

 neurals. Their measurements are given in the table above. 



468. 47''- 



Figs. 468-470. Terrapene eurypygia. 



469. 



Portions of shells. X' 



468. Plastron. 



469. Rear of carapace of type of Toxaspis anguillulatus. 

 4700. Front of carapace. No. 154 Phila. Acad. 



470&. Portion of hvpoplastra and xiphiplastra. No. 154 Phila. Acts]. 



From the measurements of" No. 155 (fig. 469), given in the table above, it will be 

 seen that all the neurals, except the first and the last, have the width considerably greater than 

 the length. The\ appear to be somewhat broader than those of" T . Carolina. 



The eighth neural was not developt. The seventh is not as long as the width of the seventh 

 costals; and, as a result of these conditions, the seventh costals meet on the midline behind the 

 seventh neural and the eighth costals join by their whole proximal width. In some specimens 

 of T. Carolina there is a long and narrow eighth neural. 



