116 REPTILES. 



Page 19. Crotalus, add 



Crotalinus sp., Rafin. Anal. Nat. 77, 1815. 



Page 19. Uropsophus durissus, add 



Lower edge of temporal streak covering the upper half of the 

 hinder upper labial shields, and forming a large spot at the under 

 part of the angle of the mouth. 



2. The Spotted Rattle-snake. Uropsophus triseriatus, 

 Wagler, Amph, 166. G^my, Zool. Misc. 51. Crotalus triseriatus, 

 Wiegmann, Mus. Berl. 



Pale brown ; temple with a dark streak from the back edge of 

 the eye, the lower edge of the streak just edging the top of the 

 hinder upper labial shields, and not continued under the angle of 

 the mouth ; crown of head and middle of occiput dark brown ; 

 back with a central series of pale-edged oblong or rhombic spots, 

 and sides with a series of irregular dark marks ; belly pale, darker 

 clouded on the sides. 



a, h. In fluid. N. America (West Coast ?) Presented by Capt. 

 Sir Edward Belcher, K.C.B., R.N. 



c. In fluid. Young and e^g. N. America (West Coast ?) Pre- 

 sented by Capt. Sir Edward Belcher, K.C.B., R.N. 



Colour somewhat like Crotalus horridus, but easily known by 

 the larger size of the labial shield and temporal scales. The refer- 

 ences to Wiegmann and Wagler should be erased from the synonyma 

 of the former species ; having been induced, until I received these 

 specimens, to place reliance on M. Schlegel's declaration, that the 

 Mexican specimens did not diff'er from the common species. See 

 Phys. Serp. ii. 366. 



Page 23. In table of genera, after Sepedon, add 



7*. Causus. Scales of sides smooth, of back slightly keeled ; 

 eyes surrounded by small scales. 



Page 24, add 



4. The Euphratic Katuka. Daboia Euphratica. Vipera 

 Euphratica, Martin, Proc. Zool. Soc. 1838, 83. 



Brownish gray, minutely black freckled ; dots forming obscure 

 bands or markings ; beneath pale yellow, obscurely mottled ; scales 



