2°10 REPTILIA : TESTUDINATA. — XXX. 
313. CHRYSEMYS Gray. (ypvads, gold; éepvs.) 
616. C. picta (Hermann). PAINTED TuRTLE. Mup TurRTLE. 
Greenish black ; plates margined with paler; marginal plates 
marked with bright red; plastron yellow, often blotched with 
brown. L.8. KE. U.S., one of the most common turtles. (Lat., 
painted ) Westward it gives place to — 
617. C. marginata (Agassiz). Plates of carapace alternating 
or in quincunx, the lateral rows out of line with the middle one, 
instead of forming sets of three as in the eastern form ; lateral 
plates with strong concentric strie. W. N. Y. and W., common. 
Perhaps a variety of the preceding, but I have seen no inter- 
gradations. 
618. C. oregonensis Holbrook. No red markings. Minn. to 
Ore. 
314. CHELOPUS Rafinesque. (yéAus, tortoise ; mods, foot.) 
a. Carapace usually more or less keeled; upper jaw deeply notched and arched 
downward. (Chelopus.) 
6. Head not notably narrower below than above. 
619. C. muhlenbergi (Schweigger). Brown with yellowish 
markings ; plastron black with yellowish blotches; an orange spot 
on each side of neck; plates of back plain or concentrically grooved. 
L. 44. E. Penn. and N. J. 
bb. Head decidedly narrower below than above. 
620. C. insculptus (Le Conte). Woop Torrtorse. Shell car- 
inated, its plates marked with concentric striz and radiating black 
lines; reddish brown; plastron with a black blotch on each plate. 
L. 8. E.U.S., E. of Ohio, in woods and fields. (Lat., engraved.) 
aa. Carapace not keeled; upper jaw slightly notched, its edge nearly straight. 
(Nanemys Agassiz.) 
621. C. guttatus (Schneider). SprckLteD Torrtorse. Black, 
with round orange spots, these spots rarely obsolete ; plastron 
yellow, blotched with black. L. 44. E. U.S, W. to N. Ind. 
(Levette), abundant E. (Lat., spotted.) 
315. EMYS Brongniart. (é€uvs, a mud turtle.) 
622. E. meleagris (Shaw). Black; usually with yellowish 
spots; plastron yellowish with black blotches; head with yellow 
spots; young nearly circular, and black. LL. 8. N.Y. to Wis., 
scarce. (eAeaypis, guine.i-fowl.) 
316. CISTUDO Fleming. (Lat., cista, box.) 
623. C. carolina (L.). Common Box Turtie. Colors very 
variable, chiefly blackish and yellowish ; no two alike in pattern ; 
iris red in @ ; hind feet with 4 toes; young keeled, the keel grow- 
