10. TEOPIBONOIUS. 193 



Bibr. Erp. G&n. Mn. p. 549 (1854) ; Gunth. Cat. Col. Sn. p. 69 



(1858), and Sept. Brit. Ind. p. 258 (1864) ; Jan, Arch. Zool. Anat. 



Phys. iii. 1865, p. 203; Bouleng. Faun. Ind., Sept. p. 341 



(1890). 

 Natrix, Bonap. Mem. Ace. Torin. (2) ii. 1839, p. 436 ; Cope, Proc, 



U.8. Nat. Mus. xi. 1838, p. 392, and xiv. 1892, p. 667. 

 Eutainia, Baird Sr Gir. Cat. N. Am. Sept. p. 24 (1853) ; Cope, Proc. 



U.S. Nat. Mus. xiv. 1892, p. 645. 

 Nerodia, Baird ^ Gir. I c. p. 38. 

 Eegina, Baird Sr Gir. I. c. p. 45. 

 Leptophis, part., Dum. Sr Bibr. t. c. p. 528. 

 Amphiesma, part.. Bum. 8r Bibr. t. c. p. 724; Jan, I.e. p. 232. 

 Tliamnopliis, Cope, Proc. Ac. Philad. 1860, p. 369. 

 Ilerpetoreas, Giinth. Proc. Zool. Soe. 1860, p. 156, and Bept. Brit. 



hid. p. 257. 

 Natrix, Giinth. Ann. ^ Mag. N. S. (3) ix. 1862, p. 124. 

 Thamnosopliis, part., Jan, Menco sist. Ofid. p. 82 (1863). 

 Neusteropnis, Giinth. Proc. Zool. 8oc. 1863, p. 16. ■ 

 Styporhynchus, Peters, Mon. Berl. Ac, 1863, p. 399. 

 Tropidophorus (non D. Sr B.), Jan, Arch. Zool. Anat. Phys. iii. 1865, 



p. 205. 

 Tropidonophis, Jan, I. c. p. 245. 

 Fowlea, Theob. Cat. Sept. As. Soc. Mus. p. 57 (1868). 

 Chilopoina, Cope, in Wheeler's Pep. Explor. Surv. W. \OQth Mer. v. 



p. 543 (1876). 

 Katophis, Macleay, Proc. Linn. 8oc. N.8. W. ii. 1877, p. 36. 

 Atomarclius, Cope, Am. Nat. 1883, p. 1300. 

 Bothrodytes, Cope, Proc. Am. Philos. 8oc. xxiii. 1886, p. 495. 

 Coliiter, Cope, Bull. U.8. Nat. Mus. no. 32, 1887, p. 59. 

 Stypocemus, Cc^e, Proc. Am. Philos. 8oc. xxiii. 1886, p. 495. 



Maxillary teeth 18 to 40, posterior longest ; mandibular teeth 

 subequal. Head usually distinct from neck ; eye rather small, 

 moderate, or large, with round pupil. Body more or less elongate, 

 cylindrical ; scales mostly keeled, in some species smooth, usually 

 with apical pits, in 15 to 33 rows ; ventrals rounded. Tail mode- 

 rate or long ; suhoaudals in two rows. Hypapophyses developed 

 throughout the vertebral cohimn. 



Europe ; Asia ; Africa ; North Australia ; North and Central 

 America. 



Synopsis of ike Species. 



I. MaxiUary teeth not more than 30, the hinder gradually enlarged ; 

 eyes and nostrils lateral ; internasal shields broadly truncate 

 anteriorly. (Teopldonottts.) 



A. Anal shields single ; a single anterior temporal *. 



1. Second row of scales keeled. 



* Eutcenia mgrolateris, Brown, with three anterior temporals, is probably 

 based on an anomalous individual. 



VOL. I. 



