10, ANCISTRODON. 521 
Ancistrodon piscivorus, Cope, Proc. Ac. Philad. 1859, p. 836; Garm. 
N. Am. Rept. p. 121, pl. viii. fig. 2 (1883); Cope, Proc. U.S. Nat. 
Mus. xiv. 1892, p. 683. 
—— pugnax, Cope, Proc. Ac. Philad. 1859, p. 336. 
Agkistrodon piscivorus, Jord. Man. Vert. N. U.S. 5th ed. p. 199 
(1888) ; Hay, Batr. Rept. Ind. p. 184 (1892) ; Loennberg, Proc. 
U.S. Nat. Mus. xvii. 1894, p. 336; Stejneger, Rep. U.S. Nat. 
Mus. f. 1893, p. 406, pl. iv. (1895). 
Snout rounded, not turned up, flat above, with sharp canthus. 
Rostral as deep as broad or slightly broader than deep; a pair of 
internasals and a pair of preefrontals; frontal as long as or a little 
shorter than its distance from the end of the snout, as long as or ~ 
shorter than the parietals, which are usually followed by a pair of 
occipitals; no loreal; upper preocular in contact with the posterior 
nasal; two postoculars and one or two suboculars; 7 or 8 upper 
labials, second forming the anterior border of the loreal pit, third 
usually entering the eye. Scales strongly keeled, in 25 (rarely 27) 
rows. Ventrals 130-147; anal entire; subcaudals 33-51, all 
single or the posterior divided. Pale reddish brown to dark brown 
above, with more or less distinct dark brown or black cross-bands 
with broken outlines, or with alternating C-shaped dark markings 
each enclosing a central spot; a dark, light-edged band from the 
eye to the angle of the mouth; beneath yellowish, spotted with 
black, or black with or without lighter variegations. 
Total length 1170 millim. ; tail 200. - 
Eastern North America, from North Carolina and Indiana to 
Florida and Texas. 
a,b. d (Sc. 27, 25; V. 146, Florida. H. MHanauer, Esq. 
148 ; C. 49, 51). BL 
ce, ad. § (Se. 25; V. 184; New Orleans. H. Hanauer, Esq. 
C. 44) & Q@ (Se. 25; (Pe). 
V. 139; C. ?). 
e, f. 6 (Se. 25; V. 141; New Orleans. 
C. 48) & yg. (Sc. 25; 
g, h. 3 (Se. 25; V. 145; Texas. 
C. 48) & Q@ (Se. 25; 
V. 143; ©. 42). 
a go (Se. 25; V. 144; C. 47). N. America. Sir H. Sloane [P.]. 
k. 2 (Se. 25; V. 187; C. 44). N. America. Dr. R. Harlan [P.}. 
l. 3 (Se. 25; V. 182; C. 41). N. America. Dr. Schaus [P. }. 
m. 9 (Se. 25; V. 147; CO. 48). N. America. Dr. Giinther [P.]. 
n-o. Yg. (Se. 25; V. 180, N. America. Zoological Society. 
131; C. 89, 39). 
p. Skull. Charleston. 
2. Ancistrodon bilineatus. 
Ancistrodon bilineatus, Giinth. Ann. § Mag. N. H. (8) xii. 18638, 
p. 864; Cope, Proc. Ac. Philad. 1865, p. 191; F. Miill. Verh, Nat. 
Ges. Basel, vi. 1878, p. 404; Cope, Broo. U.S. Nat. Mus. xiv. 
- 1892, p. 682; Giinth. Biol. C-Am., Rept. p. 186, pl. lviii. 
figs, A & B (1895), 
