1. ciiJosxEimuM. 37 



Plastron without trace of a notch, front 

 lobe longer than the fixed portion ; 

 gular shield not more than half the 

 length of the front lobe 9. leiuostoiaum , p. 42. 



Plastron without trace of a notch, front 

 lobe not longer tlian the fixed por- 

 tion ; gular more than half tlie 

 length of the front lobe 10, herendiianwn , p. A'6. 



B. Carapace tricarinate 11. anientatvm, p. 44. 



1. Cinosterimni odoratiim. 



Testudo pensylvanica, B., Schoejrff", Test. p. 110, pi. xxiv. iig. B 



(17U2). 

 odorata (Bosc), Bavd. liept. ii. p. 189, pi. xxiv. fig. 3 (1802) ; 



Leconte, Ann. Lye. N. F.iii. p. 122 (1830). 

 ? Testudo glutinata, Daud. I. c. p. 194, fig. 4. 

 Eniys odorata, SeJnceiyy. I'rod)-. p. 44 (1814). 

 Terrapene boscii, Men: Tent. p. 27 (1820). 



odorata, Men: I. c. 



Cistuda odorata, Saij, Journ. Ac. Philad. iv, pp. 206, 216 (1824). 

 Steruotheerus odoratus, Bell, Zool. Journ. ii. p. 307 (1825) ; ILdhr. 



N.Am. Herp. i. p. 133, pi. xxii. (1842) ; WtedjN. Acta Ac. Leop.- 



C'arol. xxxii. i. p. 43 (1865). 



boscii, Bell, I. c. p. 308. 



Kinosteruum odoratum, part., Bonap. Osserv. sulla sec. ediz. del 



' Begno Animale,' p. 108 (1830). 

 Kiuosternon odoratum. Gray, Syn. Bept. p. 35 (1831), and Cat. Tort. 



p. 43 (1844) ; Leconte, Broc. Ac. Bhilad. 1854, p. 185. 

 Staurotvpus odoratus, I)vm. 4i- Bihr. ii. p. 358 (1835). 

 Kiuosterinmi guttatum, Leconte, I. c. 

 Aromochelvs odorata. Gray, Cat. Sh. Bept. i. p. 46 (1855) ; Straiic/i, 



Chelon. Stud. p. 140 (18G2), and Veiih. Schildh: p. 94 (1865) ; 



Gray, Suppl. Cat. Sh. Bejd. i. p. 66 (1870). 

 Ozotheca odorata, ^^«55. Contr. K. II. U. 6'. i. p, 425, pi. iv. figs. 1-0 



(1857). 



tristycha, Agass. I. c. pi. v. figs. 20-22. 



Aromochelvs guttata, Stranch, Chelon. Stud. p. 39, 

 • tristycha, Strauch, I. c. 



Head large ; jaws very strong, upper not hooked ; symphysis of 

 the mandible about half as long as the whole mandible. Limbs 

 extensively webbed. Carapace keeled in the young, the keel usually 

 disappearing in the adult ; first vertebral shield narrow, much 

 Earrower than the second, third and fourth not longer than broad. 

 Plastron narrow, the width of the posterior lobe not more than half 

 that of the shell ; lobes shghtly, if at all, movable ; bridge narrow ; 

 front lobe rounded anteriorly, hind lobe notched posteriorly ; gular 

 shield well developed, triangular, about as long as the suture 

 between the humerals, which nearly equals that between the 

 pectorals; axillary and inguinal shields largely in contact. The 



