ISO CHELONIDiE. 



Fam. 7. CHELONID^. 



Chcloiiiadre, Grat/, Ann. Phil. (2) x. 1825. 



Chelmiiadte, Bell, Zool. Journ. iii. 1828. 



Oiacopoilcs, part., ii'df/lcr, Si/sf. Amph. 1830. 



Cheloiiiadiie, part., Grmj, Si/n. licpt. 1881. 



Thalasyitos, part., Dumcril !<,■ Bihron, Erp. Gen. ii. 183o. 



Cheloniadixj, part., Gray, Cat. Tort. 1884, and Sh. Ilept. i. 1855. 



C'lu'lonioidaj, A(jassiz, Contr. N. II. U. S. i. 1857. 



C'helouina, Straiich, Chclon. Stud. 1802. 



Clu'loniadpe, Gray, Siippl. Cat. Sh. Bept. i. 1870. 



Clieloniadne, Caouaiiidic, Gray, Proc. Zool. Soc. 1873, p. 395. 



CheloiiiidpD, Coj)e, Proc. Amer. Philos. Soc. xx. 1882, p. 143. 



Nuchal plate without costiform processes. Plastral bones nine. 

 Shell covered with ejiidermal shields. Caudal vertebra) prococlous. 

 Neck incompletely retractile ; cervical vertebrae short, mostly arti- 

 culated by amphiarthrosis *. Temple completely roofed over ; 

 parietal bone in contact with the squamosal. Limbs paddle-shaped ; 

 phalanges without condyles ; claws one or two. 



Marine. 



1. CHELONE. 



Clielonia, part., Bromjn. Bull. Soc. Philom. ii. p. 80 (1800) ; Wayler, 



Syst.Amph. p. 132 (18.30) ; Gray,Syn. licpt. p. 51 (1831) ; Dian. 



cV Bibr. ii. p. 530 (1835). 

 Caretta, part., Merrem, Tent. p. 17 (1820). 

 Caretta, (h-ay, Cat. Tort. p. 53 (1844), and Sh. Ilept. i. p. 73 (1855) ; 



Girard, U. S. Explor. Baped., Herp. p. 438 (185s) ; G'dnth. Bept. 



Brit. lud. p. 53 (1864) ; Gray, Siippl. p. 118 (1870). 

 Chelonia, Gray, Cat. Tort. p. 54, and Sh. Bept. i. p. 74 ; Ar/ass. 



Contr. N. li. U. S. i. p. 377 (1857) ; Girard, I. c. p. 452; Gimth. 



I. c. p. 52 ; Gray, Suppl. p. 119. 

 Eretmochelys (Fitz.), Ayassiz, I. c. p. 380. 

 Euehelys, Girard, I. c. p. 447. 

 Chelone, Sfrauch, Chelon. Stud. p. 59 (1862). 

 My das, Gray, Suppl. p. 119. 

 Onychochelys, Gray, Proc. Zool. Soc. 1873, p. 397. 



Carapace with persisting fontanelles between the costal and 

 marginal plates. Costal shields four pairs. An intergular and a 

 series of inframarginal plastral shields. 



1. Chelone mydas. 



Testudo nivdas, Limi. S. K. i. p. 350 (1768) ; Schoepff, Tcstud. p. 73, 

 pi. xvii.tig. 2 (1792) ; Band. Bept. ii. p. 10, pi. xvi. fig. 1 (1802). 



macropus, Walhaum, Chelonot/r. p. 112 (1782). 



viridis, Schneid. Srhildkr. p. 290, pi. — (1788). 



japonica, Thunhcry, Vcfensk. Acad. Ilandl. viii. p. 178, pi. \i\, 



fig. 1 (1787). 



cepediana, Baud. I. c. p. 50. 



Cheloniji japoiuca, Schiceiyy. Prodr. p. 21 (1814). 



* In an aclult example of Chelone mydas the sixtli and seventh centra are 

 even ancbj loscd together. 



