. Bulletin - United States National Museum. Science. Figure 2.—Head of Pituophis melanoleucus melanoleucus: a, From the side; 6, from above. the body, which number from 25 to 35 just posterior to the neck, from 27 to 37 in the middle of the body, and from 19 to 25 just anterior to the vent. The lower number of scale rows anterior and posterior to the middle of the body results from the loss of certain definite scale rows. The method of reduction will be discussed below. The ven- tral surface of the body is covered by a single series of transverse scutes, the ventrals, which vary in number from
. Bulletin - United States National Museum. Science. Figure 2.—Head of Pituophis melanoleucus melanoleucus: a, From the side; 6, from above. the body, which number from 25 to 35 just posterior to the neck, from 27 to 37 in the middle of the body, and from 19 to 25 just anterior to the vent. The lower number of scale rows anterior and posterior to the middle of the body results from the loss of certain definite scale rows. The method of reduction will be discussed below. The ven- tral surface of the body is covered by a single series of transverse scutes, the ventrals, which vary in number from 205 to 262 in the genus. Posterior to the ventral scutes, and just anterior to the vent, is a single anal plate, semilunar in shape. Posterior to the vent are the caudal scutes, which vary in number from 47 to 84 pairs. The structure of the hemipenes is so constant throughout the genus that the description of these organs in a typical specimen of any of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
