EMYDID&. 303 
Taylor. We learn from the American Naturalist (vol. x1x, 1885, p. 1208) that this gentleman 
had collected materials for Professor Cope in the Equus beds, in the region about San Diego. 
This locality is about 80 miles south of that which furnisht the type of 7. marnochi. 
The catalog number of the San Diego specimen is 3936. The matrix was a mixture of 
gravel and sand. 
It is assumed for the present that the specimen referred to belongs to 7. marnochi. The type 
is spoken of as being large. Unfortunately Professor Cope gave no measurements. ‘The length 
of the carapace of the San Diego specimen is 215 mm.; the breadth is 141 mm. The width 
is therefore two-thirds the length, indicating an elongated form. JT. ornata, of Kansas, is 
nearly as wide as long. 7. major, of Meouicianes is relatively elongated, but even here the 
width is three-fourths OF the length. The outline of the carapace is like that of J. major, the 
hinder portion being only slightly wider than the middle. ‘Vhe width at the line of the hinge 
is 137 mm.; at the seventh peripherals, 147 mm. The height is 95 mm., two-thirds the width. 
The middle of the back is rather fat. There are traces of a dorsal keel anteriorly, and these 
traces are better defined on the area of the third vertebral scute, and are yet perceptible on the 
fourth. On each side of this keel, on the third and fourth vertebral scutes, there is a distinct 
broad, but shallow, channel. Most of the area of the fifth scute is concave. 
The margins of the carapace are little fared upward, far 
less than those of 7. mayor. A distinct keel runs along each 
SIAL Length. | Width. side, joining the anterior free border of the carapace with the 
: - |— hinder free border. 
I ° 28 The individual was an aged one, and the sutures between 
S 3 
2 47 41 the bones are completely obliterated. 
2 i ~ 
2 49 ne The sulci are everywhere deeply imprest. The vertebral 
4 48 42 Pa I 
5 36 39 scutes are unusually narrow. The table herewith presents the 
—— _ = dimensions of these scutes. The lengths are taken along the 
midline; the widths are the maximum. 
The anterior end of the first vertebral projects forward between the first pair of marginals. 
Similarly the anterior ends of the third and fourth vertebrals project forward each into the 
hinder border of the scute in front. The marginal scutes are large. The first rises 22 mm. 
from the free border, the sixth 23 mm. above the lateral keel, and the ninth 27 mm. above the 
free border. 
463a. 463. 4635. 
464a. 405a. 
Fics. 463-465.—Terrapene canaltculata. Portions of the type.  3- 
463. Fourth right peripheral, with sections of the ends (a, anterior; b, posterior). 
464. Region of seventh and eighth marginal scutes, with section (a). 
465. Entoplastron and section (a) of border of hinder lobe. 
Terrapene canaliculata Hay. 
Figs. 463-465. 
Terrapene canaltculata, Hay, Bull. Amer. Mus. Nat. Hist., xxu, 1907, p. 850, figs. 5-7. 
The fragmentary remains that testify to the former existence of this species belong to the 
U.S. National Museum, having been sent there many years ago by Dr. J. P. po They 
had been found on either Whitemarsh or Skedaway Island, below Savannah, Georgia. The 
