10. ASCISIKOBON. 521 



Ancistrodon piscivorus, Cope, Proc. Ac. Philad. 1859, p. 336 ; Garm, 



N. Am. Sept. p. 121, pi. viii. fig. 2 (1883) : Cope, Proc. U.S. Nat. 



Mus. xiv. 1892, p. 683. 



pngnax, Cope, Proc. Ac. Philad. 1859, p. 336. 



Agkistrodon pisciTorus, Jord. Man. Vert. N. U.S. 6th ed. p. 199 



(1888) ; ^ay, Batr. Hept. Ind. p. 184 (1892) ; Loennberg, Proc. 



U.S. Nat. Mus. xvii. 1894, p. 336; Stejneger, Hep. U.S. Nat. 



Mus.f. 1893, p. 406, pL iv. (1895). 



Snout rounded, not turned up, flat above, with sharp canthus. 

 Eostral as deep as broad or slightly broader than deep ; a pair of 

 internasals and a pair of praefrontals ; 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 prseocular 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. <S (Sc. 27, 25 ; V. 146, Florida. H. Hanauer, Esq. 



143 ; 0. 49, 61). [P.]. 



c, d. cf (Sc. 25 ; V. 134 ; New Orleans. H. Hanauer, Esq, 



C. 44) & 2 (Sc. 25: [P.]. 



V. 139 ; 0. ?). 

 e, f. d (Sc. 25; V. 141; New Orleans. 



C. 48) & yg. (Sc. 26; 



V. 132 ; 0. 43). ^ 

 ff, h. cJ (Sc. 25; V. 145; Texas. 



C. 43) & $ (Sc. 25; 



V. 143 ; 0. 42). 

 i. d (Sc. 25 ; V. 144; 0. 47). N. America. Sir H. Sloane [P.]. 



k. $ (Sc. 25 ; V. 137 ; C. 44). N. America. Dr. R. Harian [P.]. 



I. d (Sc. 25; V. 132; 0. 41). N. America. Dr. Sehaus [P.j. 



m. 5 (Sc. 25 ; V. 147 ; 0. 48). N. America. Dr. Gunther [P.]. 



w-o. Yg. (Sc. 25 ; V. 130, N. America. Zoological Society. 



131 ; 0. 39, 39). 

 p. Skull. Charleston. 



2. Ancistrodon bilineatus. 



Ancistrodon bilineatus, Giinth. Ann. 8/- Mag. N. H. (3) xii. 1863, 

 p. 364 ; Cope, Proc. Ac. Philad. 1865, p. 191 ; F. Mull. Verh. Nat. 

 Ges. Basel, vi. 1878, p. 404 ; Cope, Proc. U.S. Nat. Mus. xiv. 

 1892, p. 682; Gunth. Biol. C.-Am., Sept. p. 186, pi. Iviii. 

 figs. A & B (1896). 



