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Extra info for Amphibians and Reptiles of Texas: With Keys, Taxonomic Synopses, Bibliography, and Distribution Maps (W.L. Moody, Jr., Natural History Series, No. 8.)

Sample text

Scales along mesoptychial fold (gular fold) conspicuously larger than adjacent gular scales ..................................................................... 55 Dorsal pattern of six to seven pale lines joined transverse by crossbars to form a 54. checkerboardpattern: dorsal pattern appearing to have more dark areas than pale . . COLORADO CHECKERED WHIPTAIL Cnemiaophorus tesselatus Dorsal pattern of eight or more pale lines joined by transverse bars, often givingthe appearance of more bars than lines: dorsal pattern appears to have more palethan dark areas ...............................................

Prefrontal scales separated by small scales: nose scaleturned up sharply and keeled: underside of tail not paler than belly: bellyusually black, markedwith yellow areas; dorsum with flve rows of brown blotches, a larger middle rowand two smaller rows per side: length about 22inches (56 cm), m ~ i m u m about 39 inches (99 cm) ............. WESTERN HOG-NOSED SNAKE* ~ e t e r o ~ nasicus on Western Hog-nosedSnake Median body blotches of males usually 35 or more, females 40 or more ........... MEXICANHOG-NOSED SNAKE .

Vertebral stripe orange, of medium width; dorsum olive gray; lateral stripe ~equentlyreduced posteriorly;narrow ventrolateral stripe usually present .... ARID LAND RIBBON SNAKE ~ha~nop~s pro~i~~s ~a~o Vertebral stripe usually some shade of gold and usually broad; dorsum olive brown; lateral stripe rarely reduced; ventrolateral stripe usually absent ................. GULF COAST RIBBON SNAKE ~ h a ~ n o p hpi rs o ~ i ~orarius us 37. Lateral pale stripe on third scale row only near head a checkerboardpattern of squarish black and white spots, black spots frequently invade lateral pale lines: a yellowish crescent mark behind the corner of the mouth followed bya large black spot; scales in 21rows, anal plate single: about 21 inches (53cm) in length, a m ~ i length m ~ around 41 inches (104cm) .............................

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