116 REPTILES. 
Page 19. Crotatus, add 
Crotalinus sp., Rafin. Anal. Nat. 77, 1815. 
Page 19. Uropsopuus 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 Sporrep Rarrre-snaxe. Uropsophus triseriatus, 
Wagler, Amph. 166. Gray, Zool. Misc. 51. Crotalus triseriatus, 
Wiegmann, Mus. Berl. a 
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, b. In fluid. N. America (West Coast?) Presented by Capt. 
Sir Edward Belcher, K.C.B., R.N. 
ce. In fluid. Young andegg. 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 differ 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 Evpuratic Katuxa. 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 
