AMPHIBIANS AND REPTILES. 173 
Thamnophis sauritus (Linnzus). 
PLATE 43. 
Ribband Snake. Ribbon Snake. Garter Snake. Slender Garter 
Snake. Snake. 
Head little distinct from body, sides but little swollen pos- 
teriorly, rather robust, and more or less depressed above, lower 
surface apparently more slightly convex. Snout rather pyra- 
midal, depressed or flattened above, its length about 44 its width 
as viewed above, and sides rather abruptly vertical. When 
viewed above elongately ovoid, with convergence rather abruptly 
ending in somewhat blunt or obtusely convex anterior profile. 
— — 
Sa et 
Ribband Snake. Thamnophis sauritus (Linneus). 
Snout projects well beyond mandible. Eye moderate, imping- 
ing on upper profile, and placed about midway in length of 
mouth or over commisure of fourth and fifth labials. Frontal 
plate elongately pentagonal, anterior margin obtusely convex, . 
sides concave, and converging rather broadly to angle posteriorly. 
Internasals broad, rather obtuse, and little smaller than pre- 
frontals, which bend down over side of snout to loreal. Parietals 
largest, elongate and converging back to an angle, with sulcus 
medianly posteriorly. Rostral large, convex. Nostril piercing 
commisure of nasals above at its junction with internasal. Loreal 
small, trapezoidal. Supraocular large, surface distinctly convex, 
and but slightly shorter than frontal. Preocular single, and 3 
small subequal postoculars. Upper labials 8, sixth largest. 
