Dr. J. E. Gray on Tortoises. 147 



2. Chrysemys pulchra, n. sp. 



Sternum with a large central blotch sinuated on the sides ; 

 pale edge to all the discal plates naiTOw, uniform ; the outer 

 angle of the vertebral plates in the middle of their margin ; the 

 marginal plates with a small central marginal spot and two or 

 three interrupted pale rings above, and a large spot and pale 

 ring, with a broad black edge, beneath. 



Hah. North America, Mississippi {Brandt). 



The specimens in the museum have been called Emys ore- 

 goniensis (Fitzinger) by Brandt ; but they are not E. or egomensis 

 of Harlan, which certainly is what I previously called C. Belln. 

 They may be one of the four species that Agassiz names but 

 does not characterize. 



3. Chrysemys Bellii. 

 Sternum with a blotch in the centre, which is longest over 

 the suture of the plates ; the yellow edge of the discal plates 

 narrow, uniform ; the outer angles of the vertebral plates in 

 the middle of the lateral margin ; marginal plates with a pale 

 edge, and divided into halves by a pale cross band ; costal 

 plates with a simple or forked subcentral pale cross band. 



Emys Bellii, Gray, Syu. Rept. 



Emys oregoniensis, Harlan, t. 31 ; Holbrook, t. 16. 



Young. Admemys marmnrata, Lord. 



Hah. West coast of North America ; British Columbia. 



Trachemys lineata^ n. sp. 



This species is very like T. Holhroohii ; but the pale mark- 

 ings of the vertebral shields are quite different, they being 

 elongate and separate from each other — the lines of the different 

 plates nearly meeting together, forming a series of continuous, 

 more or less bent, lines on each side of the very narrow central 

 line ; the black spots on the sternum are large and solid. 



Hah. North America. 



There is a young specimen in the British Museum with fine, 

 slender, obscin-e markings on the vertebral plates, and numerous 

 regular black spots with pale centre on the sternum. This 

 specimen is somewhat like the young specimen figm-ed by 

 Agassiz (Contrib. t. 3. fig. 9) as T. eJegans ; but it is also like 

 the young specimen he has figured as T. rugosa (t. 16. fig. 4), 

 but perhaps more like the former. 



Trachemys lineata is at once known from T, Holhroohii by 

 the slender lines on the vertebral plates. In the other species 

 of the genus the pale and dark lines are in more or less oblong 

 rings on each side of the vertebral plate, peculiar and complete 



10* 



