34 



CATALOGUE OF SHIELD REPTILES. 



This genus is chiefly distinguished from E?ni/s by the 

 flattened under jaw and the small size of the lower beak, 

 the under jaw being chiefly covered with a soft skin, and 

 by the slenderness of the toes and the breadth of the web, 

 which most resembles that of the genus Bafagttr. 



The annulated spot on the under surface of the marginal 

 plate on all the species I have examined is on the suture, 

 so as to occupy a portion of two ueighbouriug shields. 



* Jaws entire ; upper only slightly nicked in front. 



Vertebral plates with three longitudinal, oblong, annu- 

 lated spots, sometimes interrupted, each part forming an 

 eyed spot ; the costal plates with two or three animlated 

 spots, the larger and principal one on the hinder margin 

 sending out pale diverging tortuous lines which separate 

 the spots and transversely divide the shield into halves. 



1. Pseiidemys concinna. The Neat Emys. 



Shell oblong, smooth, keelless, olive-brown, pale ringed 

 and lined, with a pale streak across each costal shield, with 

 several unequal-sized more or less oblong annulated spots 

 on each shield ; margin with a pale central cross-band 

 above, with an oblong sutural spot beneath ; sternum yel- 

 low, clouded with black, especially near the suture of the 

 plates. Head olive ; neck and feet yellow-lined, with a 

 broad lateral streak from the back of each eye. Fore legs 

 with two yellow streaks ; webs with a triangular yellow 

 spot on the margin between each claw. 



Emys concinna, Dum. ^ Bib. Erp. Gen. ii. 289. 



Gray, Cat. Tort. B.M. 25. 



Hollrook, N. A. Ilerp. ed. 2. i. 119. t. 19. 

 Testudo concinna, Leconte, Ann. Lye. N. Y. iii. 106. 

 Terrapene concinna, Bonap. Ohs. Reg. Anim. 156 (1830). 



Hub. North America ; Savannah and Congaree Rivers. 



a. Adult (stuffed). Back keelless; costal with a square 



ring in the upper hinder angle of the first and second, 

 which is rather lower down on the third plate, and 

 with many curved lines subconcentric in front and 

 below them. North America. From the Zoological 

 Society. 



b. Young. Back slightly keeled behind ; the rings on the 



vertebral and costal plates well marked ; the principal 

 annulated spot on the hinder margin is on the upper 

 part of the first and the lower of the third plate. 

 Sternum pale yellowish, edges of the plates darker 

 clouded. North America, Louisiana. Mr. Smith's 

 {Jollectiou. 



Emys concinna, Holbrook, N. Amer. Herp. t. 19. 



c. Adult (stuffed). North America, Louisiana. Mr. 



Smith's Collection. 



d. Very young. Sternum with a large black spot, form- 

 ing a dark band on the central line and a seiies of 

 spots on each side, and a narrow transverse line across 

 the front edge ; a round spot on the outer edge of the 

 pectoral and abdominal shields near the symphysis. 

 Head and legs yellow-lined, a central frontal line, and 

 a nai row line from the hinder uj)|ier and the middle 

 of the lower edge of the orbit. Mexico. M. Parzu- 

 daski's Collection. 



M. Leconte's figure, which is engraved by Dr. Holbrook, 

 is a moderately good repiesentation of our younger speci- 

 men. It chiefly differs in the marks on the shell being 

 rather too regular and distinct, the streak on the head 

 broader, and the toes are represented as covered with scales ; 

 but both these and the claws show that it belongs to this 

 genus. 



I have received the young Emys ornata from Paris under 

 this name. 



2. Pseudemys ? hieroglypMca. The Hieroglyphic 

 Emys. 



Shell oval, depressed, keelless, smooth, entire in front, 

 elongated and imperfectly serrated behind ; sternum oblong, 

 nicked behind, dingy yellow, sides olive varied. Head very 

 small, upper jaw slightly eniarginate, lower jaw with a 

 tooth ; first vertebral urceolate ; each costal shield with 

 four or five, and each marginal with dark spots with con- 

 centric yellow lines. 



Emvs hieroglvphica, Holbrook, N. Amer. Herpet. i.47. t.2; 

 ed. 2. i. 111. t. 17. 



Gray, Cat. Tort. B.M. 26. 

 Dam. Cat. Mi'th. B. 12. 



Ilab. North America ; Cumberland River. 



A large species; the shell of the adult about 12 inches 

 long. 



I am induced to refer this Tortoise, which I have not 

 seen, to this genus, from the disposition of the colours, 

 which resembles that of the preceding species. 



** Jaws with two strong teeth above and three below in 

 front. 



Costal shield with a double subcentral cross band, con- 

 taining an oblong ringed spot in the upper part of the first, 

 the middle of the second, and the lower part of the third 



costal plate. 



3. Pseudemys serrata. The Potter. 



Shell oblong, longitudinally rugose, slightly toothed be- 

 hind ; olive-browu, varied with iiTegular pale cross bands ; 



