110 TESTUDINIDJE. 



a cf spir Washington, B.C. Smithsonian Instit. [P.]. 



b 2 ' stffd. Delaware. E. Doubleday, Esq. [P.J. 



c-e. d 2 , spir. N. America. Dr. J. E. Gray [P.]. 



f,ff- 6 2, spir. N. America. 



'h. cJ , skel. N. America. 



i, k. 6 2> shells. N. America. 



8. Clemmys marmorata. 



Emys marmorata, Baird 4* Gir. Proc. Ac. Philad. 1852, p. 177 ; 



JJocoiirt, Miss. So. Mex., Rept. p. 16 (1870). 

 nigra, Halloio. Proc. Ac. Philad. 1854, p. 91, and Rep. U. S. 



^.r;;/or. ^«ry. i?. -R. s. pt. iv. p. 3, pi. i. (1859). 

 Actiuemys marmorata, Agassiz, Contr. N. H. U. S. i. p. 444, pi. iii. 



figs. 5-8 (1857); Girard, U. S. Exphr. Exped., Herp. p. 465, 



pi. xxxii. (1858). 

 Clemmys marmorata, Strauch, Chelon. Stud. p. 108 (1862), and Verth. 



Schihlkr. p. 68 (1865). 



wosuessenskyi, Strauch, ll.cc. p. 114, pi. — , & p. 68. 



Geoclemys marmorata. Gray, Suppl. Cat. Sh. Rept. i. p. 27 (1870). 



wosnessenskyi. Gray, Ajjp. Cat. Sh. Rept. p. 11 (1872). 



Chelopus marmoratus, Cope, Check-List N. Ain. Rept. p. 53 (1875). 



Strikingly resembling Emys orbicularis. Carapace obtusely uiii- 

 carinatc in the young, the keel becomiug almost or quite indistinct 

 in the adult; shields nearly smooth in the adult, with radiating 

 striae in the young. Xuchal small, narrow ; vertebrals 2 to 4 much 

 broader than long, a little narrower than the second costal. Plastron 

 large, concave in the male, openly emarginate posteriorly ; the width 

 of the bridge much less than the length of the hind lobe ; pectoral 

 and abdominal shields subequal in size ; the longest median suture 

 is that between the auals, the shortest that between the humerals ; 

 axillary and inguinal shields absent or small. Head rather large ; 

 upper jaw not hooked, notched in the middle; the width of the 

 mandible at the symphysis nearly equals the horizontal diameter of 

 the orbit. Digits webbed to the claws, which are long and strong. 

 Tail about half as long as the shell in the males. Carapace dark 

 olive or blackish, with yellowish dots or radiating lines, which 

 markings may disappear in old specimens ; plastron yellow, sutures 

 black, with or without some large black blotches. Head olive or 

 brown above, with small black markings, yellow inferiorly, uniform 

 or black-dotted ; limbs brown, spotted with black and yellow. 

 Young coloured like those of Emys orbicularis. 



Length of shell 18 centim. 



California. 



a- h. (S , sph. Pacific Coast of N. America. 



c. Ilgr. J, spir. Santa Cruz. Mr. A. Forrer [C.]. 



(/. Ilgr.cJ, shell. San Diego. Mrs. Rosa Smith 



Eigenmanu [P.]. 



