Chap. III. GENERA OF EMYDOIDiE. 4-39 



uppoi- margin of tlio lateral scales is on a line with the lateral angle of the 

 median scales. This is already visible in the youngest specimens, at the time 

 of hatching. (Comp. PI. 1, fig. 4 and 5 with fig. 6 ; also PL .3, fig. 1 ; PI. 5, 

 fig. 2 ; and PI. 6, fig. 8 ; compare also p. 293, note). The sternum is golden 

 yellow ; occasionally, but very rarely, with a partial lyriform figure ; now and 

 then also a streak or a dot may be seen upon the costal scales. But the foiTQ 

 of the scales shows this species to differ strikingly from the others. The eggs 

 are ' represented PL 7a, fig. 1-3. Chrysemys picta is described as occurring every- 

 where in the United States; but this is incorrect. It occurs only in the Eastern 

 and Middle States as far as the northern boundary of South Carolina, whence it 

 extends to the north-western parts of Georgia. Its northern-most boundary is 

 New Brunswick, according to Mr. M. H. Perley. I have obtained specimens from 

 North Caroliua, through Mr. W. C. Kerr, and from western Georgia, through Mr. Al. 

 Gerhardt. I have never observed it in the Southern States, nor further west than 

 the western parts of Pennsylvania and New York, and the eastern parts of Ohio. 

 In western Ohio, in Indiana, Wisconsin, and Michigan, it is replaced by Clmjacmys 

 manjumia ; in Missouri, and parts of Illinois, by CJiri/scmi/s Bellii ; in Minesota, by 

 C/irysemt/s orcgonensis ; and in Louisiana and Mississippi, by Chri/semi/s dorsalis. 



Chrysemys ji.vrginata, A(j. It is flattei", broader, and more rounded than Chrys- 

 emys picta ; the bands between the scales of the carapace are either yellow or 

 blood-red, narrower than in Ch. picta, but bordered with moi'e distinct black lines. 

 Their lateral margins exhibit parallel ridges, while in Chrysemys picta they are per- 

 fectly even. The ground color is bronze green, Avitli a few red or yellow spots. 

 Upon the sternum there is a black lyriform blotch, as in Chrysemys Bellii. but 

 narrow and plain, and not mottled (see PL 5, fig. 3). This figure is, however, occa- 

 sionally wanting. The young are represented PL 1, fig. 6, and PL 5, fig. 1-4 ; 

 the eggs (PL 7a, fig. 4-6) are larger than in Ch. picta, though the animals are 

 of the same size. I am indebted for specimens of this species to Dr. P. E. Hoy, 

 of Racine, Wisconsin ; to Mr. J. A. Lapham, of Milwaukee, Wisconsin ; to Dr. Manly 

 Miles, of Flint, Michigan ; to Professor Alex. Winchell, of Ann-Arbor, Michigan ; 

 to Mr. Franklin Hill, of Delphi, Indiana ; and to Dr. Ranch, of Burlington, Iowa. 

 One specimen was sent to me from Rome, in the State of New York ; but I 

 cannot ascertain by whom, nor whether it had been found in that State. 



CinnsEMYS Bellii, Graij} By its form, this species resembles more Chrysemys 

 picta than Chrysemys marginata ; but the scales of the carapace are arranged as 



* Synops. Rcpt. in Giillilli's An. Kinnd., 1831. p. ISIus. 1844, p. 27, wlicrc Mr. Gray states that this 

 31, under the name of Eniys Ik-llii. The generic species is named Ewys speciosa by Clil't in the Cat. 

 name Chrysemys is first introduced in the Cat. Brit. Mus. Coll. Surg. No. 1525. 



