EMYSMUHLENBERGII. 61 



jaw is yellow, mingled with brown, and marked with blotches of a darker shade 

 of brown and occasional spots of orange; the lower jaw is brownish-yellow, with 

 a few spots of orange. The neck is dark brown above, with two very remarkable 

 spots on each side behind the occiput, varying in different individuals from bright 

 yellow to deep orange, almost red; these spots vary also in size and shape, they 

 are sometimes small with regular margins, at other times they resemble blotches: 

 the inferior surface of the neck is yellowish-brown, studded with small black spots. 



The anterior extremities are brownish-yellow; many of the scales are tinged 

 with orange; a dark line runs along the outer margin of the forearm. The 

 posterior extremities are dark brown on the upper surface, with occasional spots 

 of orange about the foot; the inferior surface is brownish-yellow, with one or two 

 lines of Hghter yellow. The tail is dusky yellow above, and yellow tinged with 

 orange, below. 



Dimensions. Length of shell, 3i inches; sternum, 3^ inches; height, H inches; 

 tail, H inches. 



Geographical Distribution. Its range is very limited; it being only found in 

 New Jersey and East Pennsylvania, and rare even in these districts. 



Habits. The E. Muhlenbergii lives in small brooks or streams of running water. 



General Remarks. This animal was first described and figured by Schoepflf, 

 in his Historia Testudinuin, from specimens furnished him by the Rev. Mr. 

 Muhlenberg of Pennsylvania. Schoepff" however, mistook it for a variety of the 

 Box Tortoise, and gave a drawing of the shell and sternum only. Say next 

 described it in detail, under the name E. biguttata, from the two remarkable orange 

 spots on the neck; he was probably not aware that Schoepft' had previously given 

 it another name. Leconte has since described this animal with an accuracy that 

 leaves nothing to be desired. 



