AMPHIBIANS AND REPTILES. - 179 
that general outline would be elongate-ovoid. Snout depressed, 
surface convex, its length about 24 its width, and as viewed above 
rather obtusely convex in front. Eye small, midway in length 
of mouth and over commisure of third and fourth upper labials. 
Mouth a little undulate, and gape posteriorly superior. Upper 
labials 8, mostly higher than long, and fifth largest. Lower 
labials 10, and fifth largest. Rostral broadly lunate, slightly 
impinging on anterior emargination of internasals. Postoculars 
2, small, nearly equal, and preocular single. Loreal small. 
Ne 
VON 
Wi) 
WIS) 
Chain Snake. Lampropeltis getulus (Linneus). 
Supraocular moderate, narrowly convergent anteriorly. Nasals 
2, nostril piercing anterior just before commisure. IJnternasals 
rather broad. Prefrontals also broad, and nearly twice as large. 
Frontal subpentagonal, rather narrowly convergent behind, 
and broad in front with scarcely an angle. Parietals broad, 
convergent posteriorly, and with a median posterior notch. Pre- 
genials shorter than postgenials. Scales smooth, 21 transversely 
over back and 256 counted from parietal plates to tip of tail. 
Gastrosteges 105 to vent. Urosteges divided, 41 in number. 
