8 TOETOISES, TERRAPINS, AND TURTLES. 



21. EMYS LUTARIA, Lacepkle. 

 Tab. XXXI. & XXXII. (old and young.) 

 Emys caspica, Gray, Cat. Sh. Rept. Suppl. p. 36. 

 Hab. South Europe. 



22. EMYS CONCENTRICA. 

 Tab. XXXIII.-XXXVI. 



Malaclemmys concentrica, Gray, Cat. Sh. Rept. Suppl. p. 42. 

 Hab. North America. 



The alveolar surface of this Tortoise is very broad, nearly flat, only slightly concave in front, 

 occupying the whole length of the upper jaw, very unlike the jaws of the other North- American 

 Terrapins, which, perhaps, explains the superiority of its flesh. 



Professor Agassiz truly observes, " This species varies remarkably in its colour and sculpture, as 

 well as in the size of the head," — aU characters used to separate other species of Terrapins. 



According to Dr. Holbrook this species "lives in salt water and in salt marshes, where it 

 hibernates ; far from these it is never seen. It is a timid animal, easily disturbed, and hiding 

 itself on the least alarm. It swims with great rapidity, and, unlike its tribe in general, moves 

 quickly even on land." 



It is found " from Rhode Island to Florida. They exist also along the northern shores of the 

 Gulf of Mexico. This seems to be the only Emys common to North and South America, and it does 

 not appear to be found in the West-India Islands. 



" They are very abundant in the salt marshes around Charleston, and are easily taken when the 

 female is about to deposit her eggs, in the spring and early summer months. They are then brought 

 in immense numbers to market; yet, notwithstanding this great destruction, they are so prolific 

 that their number appears undiminished. Their flesh is excellent at all times ; but in the northern 

 cities it is most esteemed when the animal has been dug out of the mud in its state of hibernation. 

 The males are smaller than the females, and have the concentric striae more deeply impressed." 



23. EMYS GEOGRAPHICA, Lesueur. 



Tab. XXXVII. & XXXVIII. 



Graptemys pseitdogeogra])Mca, Gray, Cat. Sh. Rept. Suppl. p. 45. 



Hab. North America. 



According to Dr. Holbrook, this animal inhabits many of the rivers that empty themselves into 

 the Pacific, and is abundant in some, but has never yet been found to the eastward of the Alleghany 

 range of mountains ; it is entirely aquatic ; and although frequently seen on faUen trees or rocks that 

 rise above the water, yet it only seeks the land in the breeding-season. It feeds on various small 

 fish, reptiles, &c. 



