606 ADDENDA AND COEEI&BNDA. 



^^^ . Page 240. Tropidonotus rigidus. 



Eegina rigida, Bocourt, Miss. So. Mex., Rept. p. 748, pi. liii. fig. 7 

 (1893). 



^^^ . Page 242. Tropidonotus anoscopus. - ^^^y 



a. cJ (V. 144; 0. ?). ? Christiania Mus. 



^^^. Page 242. Tropidonotus fasciatus. ^a „^ 



Tropidonotus rliomlaifer, Bocourt, Miss. Sc. Mex., Rept. p. 761, pi, liv. 

 fig. 5 (1893). 



anomalus, Werymr, Zool. Am. 1893, p. 362. 



Natrix fasciata, Loennberg, Proa. U.S. Nat. Mus. xviii. 1894, p. 331. 



fasciata pictiventris. Cope, Am. Nat. 1895, p. 677. 



sipedon, Rhoads, Proo. Ac. Philad. 1895, p. 387. 



A. Forma typica. 



r. iS (Sc. 25; V. 143; Wisconsin. Christiania Mus. 



0. 69). 

 s. Yg. (Sc. 23 ; V. 182 ; Alabama. Christiania Mus. 



C. 68). 



D. Var. rhomhifer. 



e (J (Sc. 27 ; V. 146 ; New Orleans. Christiania Mus. 



C. 76). 



^ijij . Page 244. Tropidonotus cyclopium. 



Natrix cyclopion, Loennberg, Proo. U.S. Nat. Mus. xvii. 1894, 

 p. 332. 



^^^ . Page 245. Tropidonotus taxispilotus. 



Natrix taxispUota, Loennberg, I. c. p. 332. 



e. Yg. (Sc. 31 ; V. 138 ; Pensacola, Florida. Christiania Mus. 

 0. 75). 



Page 246. Add a species : — 



47a. Tropidonotus variabilis. 



Hemigenius variahilis, Bugis, Proc. Amer. Philos. Soc. xxv. 1888, 

 p. 182, fig. ; Bocourt, Miss. Sc. Mex., Rept. p. 741, pi. liii. fig. 5 

 (1893). 



Posterior maxiUary teeth abruptly enlarged. Eye moderate. 

 Rostral broader than deep, visible from above ; intemasals shorter 

 than the prsefrontals ; frontal once and a half as long as broad, 

 longer than its distance from the end of the snout, shorter than the 

 parietals ; loreal as long as deep ; two prse- and two postoculars ; 

 temporals 1 + 2 ; seven upper labials, third and fourth entering the 

 eye ; four lower labials in contact with the anterior chin-shields, 

 which are longer than the posterior. Scales in 15 rows, strongly 



