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207 
in that work. It may he added, however, that, while, as stated in that 
paper, the pregnant females examined had a maximum number of 25 
embryos, two females later kept in captivity each gave birth to 35 young. 
8. Thanmophis sirtalis parietalis (Say) .-Red-sided Garter-snake. 
This garter-snake is much less common in Clay and Palo Alto counties 
than is its relative, T. radix. Only three specimens (the only ones seen) 
were secured by the expedition. Of these one was taken on the margin of 
a slough in Freeman township. Clay county, another in a similar habitat 
in Highland township, Palo Alto county, and a third near a marshy spot 
on upland prairie in Highland township, Palo Alto county. In 1903, the 
writer took three other specimens in Freeman township, Clay county, 
in a stubble field on high ground. Descriptions of the western Iowa 
specimens may be found in the revision of the genus cited above. 
9. Liopeltis vernalis (De Kay). — Green Snake. A single specimen 
of this snake was taken on the upland prairie in Freeman township. Clay 
county. The species is apparently rather uncommon in this region, but 
has been observed by the writer in the meadows of western Palo Alto, 
and eastern Clay counties. The single specimen obtained has 15 scale 
rows for the entire length (as is usual in the species), 7 supralabials, 8 
infralabials, 74 subcaudals and 141 ventral plates. 
10. TIeterodon nasicus Baird and Girard. — Western Ilog-nosed Snake. 
As has been elsewhere stated,^" II. nasicus is the representative of the 
genus in Clay and Palo Alto counties. While not uncommon in this re- 
gion, the species apparently has a very restricted distribution. A¥e 
found it only on the uplands where the original prairie conditions had 
not been disturbed. All of the specimens obtained were taken in Free- 
man township. Clay county, but the writer has observed it in Highland 
township, Palo Alto count}^ 
The scutellation of the five specimens obtained is quite uniform. The 
dorsal scale formula is 23-21-19-17, and the supralabials 8, in every speci- 
men. The infralabials are 10 in three specimens, 10-11 in one, and 11-12 
in another. In two males the ventrals are 139 and 142, in two females 
they are 148 and 150. The tails are broken in several so that the num- 
ber of urosteges cannot be determined. In all of these specimens the 
plates on the surface of the muzzle are considerably broken up, the ac- 
cessory scales separating the pref rentals, the internasals from the azygos, 
and the anterior nasals from the posterior prolongation of the rostral. 
The color needsmo other description than the statement that it is normal. 
The brownish gray ground color above is relieved by the usual brown 
^^Ruthven, Alexander G., Amer. Natur., Vol. XLII, p. 391. 
