140 SYSTEMATIC LIST AND SYNONYMY. 



O P H I D I A— Continued. 



1859, P. R. R. Rep., X, pi. 36, f. 3; Coop., 1860, P. R. R. Rep., Xll 



(2), 296; Yarr., 1875, Wheel. Rep., V, 550; Coues & Yam, 1875, 

 Hayd. Rep., IV, 281. Trap, sirtalk var. Jan, 1863, Sist, 69, — 1865, 

 Arch. Zool., 211. Eutaenia cooperi Kenn., 1859, Pr. Phil. Ac; Coop., 



1860, P. R. R. Rep., XII (2), 296; Yarr., 1875, Wheel. Rep., V, 551. 

 Trop. sirbrtis var. cooperi Jan, 1863, Sist., 69, — 1865, Arch. Zool., 212. 

 Eutaenia elegans B. & G., 1853, Serp., 34; (Kenn.) Bd., 1859, P. R. R. 

 Rep., X, Rept, 10 ; Yarr., 1875, Wheel. Rep., V, 549. Trop. elegans 

 Jan, 1863, Sist., 70, — 1865, Arch. Zool., 214. E. cyrtopsis Kenn., 1860, 

 Pr. Phil. Ac, 333; Cope, 1866, Pr. Phil. Ac, 3C6; Yarr., 1875, Wheel. 

 Rep., V, 550; Cope, 1880, Bull. 20, U. S. Mus., 23. Thamnophis cyr- 

 topsis var. cydides Cope, 1860, Pr. Phil. Ac, 299. E. ordinoides B. & G., 

 1853, Serp., 33; Grd., 1858, Expl. Exp., Herp., 153, pi. 14, f. 1-4; Bd., 

 1859, P. R. R. Rep., X, pi. 26, f. 3.; Yarr., 1875, Wheel. Pep. V, 548. 

 Tropidonotus ordinoides B. & G., 1852, Pr. Phil. Ac, 176. T. sirtalis 

 var. ordinoides Jan, 1863, Sist, 69, — 1865, Arch. Zool., 211. Trop. 

 concinnus Hall., 1852, Pr. Phil. Ac, 182. Eut. coneinna B. & G., 1853, 

 Serp., 146 ; Bd., 1859, P. R. R. Rep., X, Eept., 10; Coop., 1860, P. R. 

 R. Rep., XII (2), 298; Yarr., 1875, Wheel. Rep., V, 549. E. ham- 

 mondi Kenn., 1860, Pr. Phil. Ac, 332; Yarr., 1875, Wheel. Rep., V, 

 549. Trop. hamrnondi Jan, 1S63, Sist, 70, — 1865, Arch. Zool., 215. 

 Eutaenia atrata (Kenn.) Coop., 1860, P. R. R. Rep., XII (2), 296; 

 Yarr., 1875, Wheel. Rep., V,. 551. Trop. sauritus var. Jan, 1863, 

 Sist, 70, — 1865, Arch. Zool. Eut. sumichrasli Cope, 1866, Pr. Phil. 

 Ac, 306; Yarr., 1875, Wheel. Rep., V, 547. Thamnophis scalaris 

 Cope, 1860, Pr. Phil. Ac, 369. Exdaenia scalaris Cope, 1866, Pr. Phil. 

 Ac, 306 ; Yarr., 1875, Wheel. Rep., V, 549. Eutaenia pliermx Cope, 

 1868, Pr. Ac. Phil., 134; Yarr., 1875, Wheel. Rep., V, 549. (?) Trop. 

 scaliger Jan, 1863, Sist, 70. (?) Trop. glaphyros Jan, 1863, Sist., 70. 

 T. ruficeps Peters, 1869, Mb. Brl. Akad., S77. 



California to Mexico. 



Var. QUADRISERIALIS 



Tropidonotus quadriserialis Fischer, 1879, Verh. Nat. Ver. Hamb., 82. 

 Labials 8. Infralabials 10. Orbitals 1 — 3. Scales in 19 rows, 

 keeled. Ventrals 149. Anal bifid. Subcaudals 79 pairs. Oliva- 

 ceous, with four rows of small black spots. 



Mazatlan, Mexico. 



(Nerodia.) 



Tropidonotus sipedon (Water Snake) ................ 25 



Coluber sipedon Linn., 1758, Syst, I, 219, — 1766, Syst., I, 379; Gmel., 

 1788, Syst. Nat. Linn., I, 1098; Shaw, 1802, Zool., Ill, 496; Merr., 

 1820, Syst, 124; Hark, 1827, Jour. Phil. Ac, 351, — 1835, Med. Res., 

 114; Storer, 1839, Eept. Mass., 228; Thompson, 1842, Hist. Vermont, 

 118. Tropidonotus sipedon Holbr., 1842, Herp., IV, 29, pi. VI; Dum. 

 Bibr., 1854, Erp., VII, 568. Nerodia sipedon B. & G., 1853, Serp., 38 

 Baird, 1854, N. Y. Serp., 16, — 1859, P. R. R. Rep., X, pi. 27, f. 27. 



