1352.) 177 
Croratus Lucirer, B. and G. Head subcircular or elliptical, nearly one inch 
and a quarter in length, covered on the vertex with very small and polygonal 
scales, elliptical and slightly carinated on the occipital region. One large supra 
orbital scutella obliquely striated. Eyes proportionally small, ten large anterior 
orbital plates ; the upper one, which is the longest, is polygonal, whilst the lower 
one is triangular. The rostral plate is rather small, pointed above, higher than 
broad and pentagonal in form. The general color is reddish brown above, 
deeper along the dorsal line than on the sides, yellowish beneath. For two 
thirds of the length there exists on the back a series of subcircular white rings 
lined internally with a narrow, black line. There are on the sides a series of 
irregular blotches which extend to the belly. The posterior third of the body 
is alternately semi-annulated above with black and yellow, the yellow, however, 
being much narrower than the black. 
From Oregon and California. 
Emys Marmorata, B and'G. The shape of the shell seen from above is regu- 
larly elliptical, slightly concave anteriorly, with a small notch behind. It is 
rather depressed and provided with a slight dorsal keel. Ventral shield rounded 
in front, openly concave behind. The tail is very slender and tapering. The 
posterior nails are stouter than the anterior ones and very much arched. The 
color is yellowish brown marbled with black. 
The largest specimen under examination measures four inches in length from 
the tip of the snout to the end of the tail; the shell itself being only two inches 
and three-eighths in lengith and a little over two inches in width. 
From Puget Sound. 
The Committee on Dr. Hallowell’s descriptions of new Reptiles, re- 
ported in favor of publication in the Proceedings. 
Descriptions of new Species of Reptiles inhabitang North America. 
By Epwarp Hatiowett, M.D. 
TROPIDONOTUS RHOMBIFER. 
Sp. Char. Head elongated, depressed, slightly swollen at the temples; a 
series of dark colored rhomboid spots upon the back, presenting the form of 
triangles, their apices posteriorly and anteriorly touching each other; a row of 
dark colored transverse bars upon the sides, uniting with the lateral inferior 
extremities of the rhomboid spots upon the back; a series of dark colored bands 
upon the tail; abdomen and under part of tail more or less maculated; seuta 
very strongly carinated; 25 rows of carinated scales; abdominal scuta 142; 
- sub caudal 70. _ 
Dimensions. Length of head 12 inches (Fr.); greatest breadth posteriorly 
10 lines; length of body 2 ft.; of tail 64 inches; total length 2 ft. 8 inches. 
Habitat. Arkansas river and its tributaries, near the northern boundary of 
the Creek Nation; found abundantly on the borders of streams. Dr. Wood- 
house observed one with many young on one of the sand banks of the Arkansas 
river. 
TROPIDONOTUS TRANSVERSUS. 
Sp. Char. Head large, swollen at the temples, convex posteriorly, flattened 
between the orbits, depressed in front; a series of subquadrate dark colored 
blotches, thirty-six or thirty-seven in number, along the back; a transverse 
row of oblong bars along the sides, their upper margins alternating with the 
inferior margins of the dorsal blotches; scales strongly carinated, 23 rows; 
abdominal scuta 144; sub caudal 78. 
Dimensions. Length of head 12 lines; greatest breadth 7; length of body 
i ft. (Fr.) 5 inches 7 lines ; length of tail 6 inches; total length 2 ft. 
Habitat. Creek boundary, found near the banks of the Arkansas and its tri- 
butaries. j 
