. Bulletin - United States National Museum. Science. Figs. 358-360.—Coluber berus. L', x nat. .size. ;«s. Tor ok head; 359, side oi head; 300, under- side OF head. No. , of ventrals in the west is shown by a still lower average of 143 ven- trals in 54 British specimens or even in 11 specimens from the Pyrenean peninsula. Description.^Adult female; No. 14325; Dui, island of Sakhalin (figs. 358-360). Rostral slightly higher than wide, well visible from above; snout above covered by about 16 scales, the fragments of internasals and prefrontals, of which two join the
. Bulletin - United States National Museum. Science. Figs. 358-360.—Coluber berus. L', x nat. .size. ;«s. Tor ok head; 359, side oi head; 300, under- side OF head. No. , of ventrals in the west is shown by a still lower average of 143 ven- trals in 54 British specimens or even in 11 specimens from the Pyrenean peninsula. Description.^Adult female; No. 14325; Dui, island of Sakhalin (figs. 358-360). Rostral slightly higher than wide, well visible from above; snout above covered by about 16 scales, the fragments of internasals and prefrontals, of which two join the rostral and two larger ones cover the canthus rostralis between naso-rostral and supraocular; frontal as long as its distance from tip of snout, wider than supraoculars, from which it is separated by a series of scales; parietals irregularly broken up, the two large shields adjoining the frontal somewhat smaller than the latter; nostril large, in the middle of the posterior nasal, the anterior nasal, or prenasal, not entering nostril and therefore also known as naso-rostral; three loreals behind posterior nasal, one above, two below; eye on sides and below surrounded by nine scales, ten on right side; temporals numerous scales, more or less irregular, those of the anterior row not larger than the postoculars; nine supralabials, fourth and fifth largest,. 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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