1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 575 



•as the western and southwestern tj-pe, and Terrapene {CisUuIo) ornata 

 as the northwestern type. Owing to the limited data accessible he 

 failed to recognize that the last-named species is the western form, from 

 the Yellowstone to the Eio Grande. He also mentions Terrapene 

 {('isU(do) major as the southern and southeastern type of the genus. 



Cope, in 1S7."), states that Terrapene Carolina is found in the "Eastern 

 region and Louisianian and Floridian districts:" T. triunguis in the 

 '•austroriparian region to Georgia, eastern Pennsylvania," and T. ornata 

 in the " Central region." 



Baur, in 1893, gives the geographical distribution of the species as 

 follows: T. mujor, ''Southern States;" T. carol iiia, "Eastern States to 

 Indiana;" T. mexicana, "Mexico;" T. triunguis, "Louisiana, Arkansas, 

 Indian Territory, Mississippi, Georgia;" T. ornata, "Central States." 



The writer's notes on tlie geogiaphical distribution of Terraijene will 

 be given under a separate heading. 



Geuus T E R R A P E N E, M e r r e in. 



1820. — Terrapene, Merrem, Versucli eines Systems der Amphibien, p. 27 (type, Testudo 

 clatisa, Gmelin=T. Carolina, Linn.eus).— Baur, Zool. Auz., 1888, No. 296; 

 Science, xvii, 1891, p. 190; Proc. Amer. Philos. Soc, 1892, p. 245. 



1822. — Cisiuda, Fleming, Philosopliy of Zoology, ii, p. 270. 



1832. — Diclida (part), Rafinesquk, Atlantic Journal, i, p. 64 (in Analyse de la Nature, 

 1815, name only). 



18iio.—Pi/xidemys (part), Fitzinger, Ann. "Wiener Mus., i, p. 123. 



1844. — Emyoides, Gray, Catalogue of Tortoises in British Museum, j). 27. 



18i9.—Onychotria, Gray, Proc. Zool. Soc. London, 1849, p. 17. 



1857. — Cistudo, Agassiz, Contributions to the Natural History of the United States, 

 I, p. 444. — BoULENGER, Catalogue of the Chelonians in British Museum, 

 1889, p. 114— Baur, Proc. Amer. Philos. Soc, 1892, p. 44. 



KEY TO THE SPECIES OF TERREPEXE. 



I. Three digits on the hind foot. 



1. Zygomatic arch complete. Webs absent. Phalanges ou the fore foot 2-3-3- 



3-2, hind foot 2-3-3-2-1 bauri, p. 576. 



2. Zygomatic arch incomplete. Webs absent. 



a. Number of phalanges in tlie fore foot 2-3-3-2-2, hind foot 2-3-3-3-1. 

 Carapace tectiform mexicana, p. .579. 



h. Number of phalanges in fore foot 2-3-3-2-2, hind foot 2-3-3-2-1. Cara- 

 pace not tectiform TRIUNGUIS, p. 580. 



II. Four digits on the hind foot. 



1. Zygomatic arch complete. Webs distinct. Phalanges in the fore foot 2- 



3-3-3-2, hind foot 2-3-3-3-2 ,. ma.jor, p. 575. 



2. Zygomatic arch rudimentary. Digits slightly webbed. Phalanges in the fore 



foot 2-3-3-3-2, hind foot 2-3-3-3-2. Carapace keeled . . Carolina, p. 577. 



3. Zygomatic arch absent. Webs absent. Phalanges in the fore foot 2-2-2-2- 



2, hind foot 2-3-3-3-1. Carapace not keeled ornata, p. 581. 



TERRAPENE MAJOR (Agassiz). 



1857. — Cistudo major, Agassiz, Contributions to the Natural History of the United 

 States, I, p. 445 (type in Mus. Comp. Zool., Cambridge, Mass. ; locality of 

 tyije. Mobile, Ala.). — Garman, Bull. Essex Inst., xvi, 1884, p. 10. 



