336 



PROCEEDINGS OF THE ACADEMY OF 



Garden of Plants, Paris. 



Var. meg asp ilu s nob. Head somewhat broader than usual. Breadth 

 of vertical plate nearly equal to it's length. Superciliaries large. Posterior 

 frontals five-sided, not rounded laterally and posteriorly. Temporal region 

 scaled. About twenty large, annular black spots on each side, arranged alter- 

 nately, and often confluent on the back. These enclose rhomboidal brown 

 spaces, each of which has a central black spot. Gastro- and urosteges black, 

 with aiew white variegations. 142 X 1X46. 



One spec, No. 136. Habitat? Perry Expedition. 



b. Scales smooth. Calloselasma nob. Leiolepis Dum. and Bibr., 1854, 

 not of Cuvier, 1829. 



3. T. rhodostomus Boie. 

 One spec. Java, 



Ancistrodon Beauv. 



Trans. Am. Phil. Soc, iv., 381, 1799. Cenchris Daud., Hist. Rept. 1803. 

 Toxicophis Troost, Ann. Lye, New York, iii., 190, 1833. 



M. P. de Beauvois, in characterizing this genus, alluded to the characters 

 by whieVt it ma.v be known from all others, viz : the plated bead, pjit.ire uros- 

 teges, and absence of rattle. Hence his name cannot be set aside for Cenchris, 

 of later date. He spelled it Agkistrodon, but according to the universal rule 

 of latinizing the Greek, it should be Ancistrodon. 



4. A. contortrix Bd. & Girard. 

 Two spec. FoxbuTg, Penna., 

 One " Pottsville, 



" " . South Carolina, 



Two " Mobile, Ala., 



Eight " Kansas, 



Three " Loc. ignot., 



5. A. piscivorus nobis. Toxicophis piscivorus B. & G., Smiths. Catal., 

 p. 19. 



One spec. Adams Co., Miss., H. Sargent. 



Two " South Carolina, Dr. Holbrook. 



Two " Loc. ignot., Dr. Wilson and Garden of Plants. 



Prof. Baird. 

 C. T. Hughes. 

 Dr. Holbrook. 

 Dr. Nott. 

 Dr. Hammond. 

 Dr. Wilson. 



6. A. p u g n a x Ho&is. Toxicophis pugnax B. & G., Smiths. Cat., p 



Six spec. 



Texas, 

 Crotalophorus Gray. 



20. 

 Dr. Heermann. 



Am. Philos. 205, 1825. 



7. C Kir t Ian dii Holbr. 



8. C. tergeminusflo/k 



One spec. 

 << << 



Five " 



9. C. miliarius Holbr. 

 Three spec. 

 One 



One " 

 One " 



Two spec. 



Ohio, 



Kansas, 

 Loc. ignot., 



Ohio, 



S. Carolina, 



Georgia, 

 Florida, 



CroTalus Linn. 



Dr. Holbrook. 



Col. McCall. 

 Dr. Hammond. 

 Dr. Wilson, et ah 



Dr. Holbrook. 

 Dr. Leidy. 

 Dr. Jones. ' 

 F. Party. 



29. 



Urocrotalon Fitzinger, Syst. Rept. Schema, p. 



Uropsophus Wagler, Amphib., p. 176. 



The confusion in the synonymy of some of the species of this genus is very 

 great, and is not diminished by the frequent reference of good species by Eu- 

 ropean herpetologists, as varieties of others previously described. Thus in the 



[Dec, 



