440 



AMERICAN TESTUDINATA. 



Part II. 



iu the latter, while the margin of the costal scales is smooth. There are a 

 few irregular yellow or red bands across the costal scales, with a few red dots. 

 The ground color is copper-red, or bronze colored. The lyriform black blotch of 

 the sternum has lateral angular projections. I have received many specimens 

 from the Osage River, in Missouri, through Mr. G. StoUey. Dr. George Engel- 

 mann has also sent me many from St. Louis ; and I have found it myself in 

 western Illinois. The young are represented PI. 6, fig. 8 and 9. 



Chrysemys oregonensis, A(/} Mr. Nuttall, who discovered this species, states that 

 it was found m Oregon ; Prince Max von Neu-Wied observed it near Fort Union, 

 on the Upper Missouri. I have received specimens from the Smithsonian Insti- 

 tution, collected near Fort Snelling, Minesota, in the Yellow Stone River, Nebraska, 

 and among the Guadalupe Mountains, in Texas. My friend James M. Barnard has 

 brought me a living specimen from White Bear Lake, Minesota, which agrees exactly 

 with Dr. Holbrook's original specimen, now in the Museum of the Academy of 

 Natural Sciences, in Philadelphia. The back has numerous yellow lines upon a 

 greenish ground, and the steriaum regular blotches in the form of a lyre all over 

 its surface. The young represented (PI. 3, fig. 1-3) belongs to the Smithsonian 

 Institution. 



Chrysemys dorsalis, Aff. 1 have seen only a few specimens of this species, 

 the only one of the genus which I have not kept alive for a considerable time. 

 They were sent to me by Prof Wailes, who collected them in the States of Mis- 

 sissippi and Louisiana.^ Lake Concordia is the locality whence most specimens were 

 obtained. The Smithsonian Institution possesses specimens from the same source. 

 This is the broadest and shortest species of the genus. It is easily distinguished 

 by the great width of the median scales of the carapace; their form resembles 

 more that of the scales of the young Ch. picta than that of the adidts of other 

 species. Margin of the costal scales plicated, as in Ch. marginata. As in Ch. 

 picta, the sternum is uniformly golden yellow. The yellow median stripe along the 

 back is broader than in any other species. The marginal scales are not so 

 highly ornamented as in other species. Indeed, the characteristic, crescent-shaped 

 figures of the margin occur only upon the lower surface, and are quite pale. 





^ This is Harlan's Emys oregonensis (Am. Journ. 

 Sc, vol. 31, p. 382, pi. 31, and Holbrook's N. Am. 

 Herp. vol. 1, p. 107, pi. 16). I have great doubts re- 

 specting the accuracy of the statement of Nuttall, that 

 this species was found in Oregon. It has never been 

 seen in that territory by the many expeditions which 

 have explored it since Nuttall ; nor did Dr. Picker- 

 ini; notice it when there with the United States Ex- 



ploring Expedition. I am therefore inclined to believe 

 that he made some mistake in reference to its oriffin. 



o 



^ I suppose that the specimens carried from New 

 Orleans to Paris by Mr. Trecul, and referred to 

 Emys picta by Dumeril, belong to this species. I 

 have never seen Ch. picta anywhere in the States 

 bordering on the Gulf of Mexico. Prof. Wailes also 

 quotes this species as Emys picta in his Geol. Rep. 



