HERPETOLOGY. 



PLATE XL 



Fig. 1, represents Liophis merremi, size of life. — p. 159. 



Fig. 2, is a side view of the head. 



Fig. 3, an upper view ; and, 



Fig. 4, an under view of the same region. 



Fig. 5, represents the dorsal scales. 



Fig. 6, the vent and adjoining scutellae. 



Figs. 2-6, are magnified about half their diameter. 



Fig. 7, represents Cantoria yiolacea, size of life. — p. 156. 



Fig. 8, is a profile of the head. 



Fig. 9, an upper view ; and, 



Fig. 10, an under view of the same region. 



Fig. 11, represents Sibynon nebulatus, size of life. — p. 142 



Fig. 12, is a profile of the head. 



Fig. 13, an upper view; and, 



Fig. 14, an under view of the same region. 



Fig. 15, represents the outline of the scales. 



Fig. 16, the vent and adjoining scutellae. 



Figs. 12-16, are magnified about half their diameter. 



PLATE XII. 



Fig. 1, represents Calljrhtnus patagoniensis, size of life. — p. 

 139. 



Fig. 2, is a profile view of the head. 



Fig. 3, an upper view; and, 



Fig. 4, an under view of the same region. 



Fig. 5, a group of dorsal scales. 



Fig. 6, the vent and surrounding scutellae. 



Fig. 7, represents Dendropiiis prasinus, size of life. — p. 131. 



Fig. 8, is a profile of the head. 



Fig. 9, an upper view ; and, 



Fig. 10, an under view of the same region. 



Fig. 11, the dorsal scales. 



PLATE XIII. 



Fig. 1, represents Tropidonotus junceus, size of life. — p. 145. 



Fig. 2, is a side view of the head. 



Fig. 3, an upper view; and, 



Fig. 4, an under view of the same region. 



Fig. 5, represents the dorsal scales. 



Fig. 6, the vent and surrounding scutellae. 



Fig. 7, represents Eutaenia leptocephala, size of life. — p. 151. 



Fig. 8, is a profile of the head. 



Fig. 9, an upper view ; 



Fig. 10, an under view ; and, 



Fig. 11, a front view of the same region. 



Fig. 12, shows the dorsal scales. 



Fig. 13, the vent, and surrounding scutellae. 



Fig. 14, represents Eutaenia pickeringi, size of life— p. 150. 



Fig. 15, is a profile of the head. 



Fig. 16, an upper view; 



Fig. 17, an under view; and, 



Fig. 18, a front view of the same region. 



Fig. 19, exhibits the dorsal scales. 



Fig. 20, is the vent, with its surrounding scutellae. 



PLATE XIV. 



Fig. 1, represents Eutaenia ordinoides, size of life. — p. 153. 



Fig. 2, is a profile of the head. 



Fig. 3, an upper view; and, 



Fig. 4, an under view of the same region. 



Fig. 5, represents Eutaenia vagrans, size of life. — p. 154. 



Fig. 6, is a profile of the head. 



Fig. 7, an upper view ; and, 



Fig. 8, a view from beneath, of the same region. 



Fig. 9, exhibits the dorsal scales-. 



Fig. 10, the vent and adjoining scutellae. 



Figs. 7-10, are magnified about one-half their diameter. 



Fig. 11, represents Eutaenia infernalis, size of life. —p. 148. 



Fig. 12, is a profile of the head. 



Fig. 13, an upper view ; and, 



Fig. 14, an under view of the same region. 



Fig. 15, exhibits the dorsal scales. 



Fig. 16, the vent and surrounding scutellae. 



Figs. 12-16, are magnified about one diameter. 



PLATE XV. 



Fig. 1, represents Crotalus lucifer, size of life.— p. 187. 



Fig. 2, is a side view of the head. 



Fig. 3, an upper view ; 



Fig. 4, an under view ; and, 



Fig. 5, a front view of the same region. 



Fig. 6, exhibiting the dorsal scales. 



Figs. 7-9, Sabrina tessellata.— p. 106. 



Fig. 7, is a profile of the head. 



Fig. 8, an upper view of the same ; and, 



Fig. 9, an under view, exhibiting the outline and shape of the 

 mouth. 



Figs. 7-9, are magnified about four times, so as to show more 

 distinctly the various plates. 



