. The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California. rontal, supraocular of each side, and a pair of and posterior nasals usually distinct, sometimesunited. Loreal usually elongate. One or usually two pre-oculars, and two to five, usually three, postoculars. Tipsof some labials often cut off, forming suboculars or to 10, usually eight, and 10 to 14, usually 13 or 12,inferior labials, next to last superior and sixth or se
. The reptiles of western North America, an account of the species known to inhabit California and Oregon, Washington, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora and Lower California. rontal, supraocular of each side, and a pair of and posterior nasals usually distinct, sometimesunited. Loreal usually elongate. One or usually two pre-oculars, and two to five, usually three, postoculars. Tipsof some labials often cut off, forming suboculars or to 10, usually eight, and 10 to 14, usually 13 or 12,inferior labials, next to last superior and sixth or seventhinferior usually largest in its series, fourth or fifth superiorusually reaching eye, first pair of inferior meeting on medianline. Temporals in first row varying from two to six,usually four or three, very variable. Two pairs of genials,anterior much larger than posterior. Scales on body in 29to 33 rows, usually 31, keeled except in a varying number(about three to 10) of rows on each side. Anal plate notdivided. Gastrosteges varying in number from 200 to 230,males having from 207 to 230, females from 200 to 230. Oc. Paiir^, Ai ad. Si i., Wh . .\ \ W Dl \BIRI 7 + <t?^-.
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Keywords: ., bookcentury1900, bookdecade1920, booksubject, booksubjectserpents
