28. COLUBER 679 
Zamenis lateralis Brown, Proc. Acad. Nat. Sci. Phila., 1901, p. 61 (part); 
Dirmars, Reptile Book, 1907, p. 288; RurHiinc, Copeia, No. 15, 
1915S. 
Coluber lateralis GRinNELL & Camp, Univ. Cal. Publ. Zool., Vol. 17, 
No. 10, 1917, p. 190; STEJNEGER & Barsour, Ckec List N. Amer. 
Amph. Rept., 1917, p. 80; Cowes, Journ. Entomol. & Zool..Pomona 
College, Vol. XII, No. 3, 1920, p. 66; SrepHENS, Trans. San Diego 
Soc. Nat. Hist., Vol. III, No. 4, 1921, p. 64; Van Denspurcu & 
Stevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, p. 59; NELson, 
Mem. Nat. Acad. Sci., Vol. XVI, 1921, pp. 114, 115. 
Description —Head long, with flattened top and narrow, 
rounded snout. Rostral plate large, about as high as broad, 
hollowed below, and bounded behind by internasal, anterior 
nasal, and first labial plates. Plates on top of head are a 
pair of internasals, a larger pair of prefrontals, supraocular 
and part of upper preocular of each side, a long and pos- 
teriorly narrow frontal, and a pair of very large parietals. 
Anterior and posterior nasals distinct. Loreal rather large, 
rarely with a small plate below it. Preoculars two, upper 
much larger than lower. Postoculars two (or three), nearly 
equal. Temporals two followed by two, rarely 2+3, 1+2, 
or 1+1. Eight, or rarely seven or nine, superior and nine or 
ten (rarely eight) inferior labials, seventh (or sixth) upper 
and fifth lower usually largest, fourth and fifth (or third 
and fourth) upper reaching eye, first pair of lower meeting 
on median line. Genials in two pairs, posterior larger than 
anterior. Scales on body smooth, in 17 rows. Anal plate 
divided. Gastrosteges varying in number from 186 to 202. 
Urosteges in two series of from 111 to 133. Tail very long 
and slender. 
The color above, including the tips of the gastrosteges 
and urosteges, is dark brown, palest on the tail. A single 
light yellow or white line extends along each side, on the 
third and fourth rows of scales, to, or a little beyond, the 
base of the tail. This line is often bordered with black, 
