470 FOSSIL TURTLES OF NORTH AMERICA. 
Plastomenus acupictus Hay. 
Fig. 629. 
Plastomenus acupictus, Hay, Bull. Amer. Mus. Nat. Hist., XX111, 1907, p- 852, plate liv, figs TS 25 
text-fg. 8. 
The fragmentary remains of this species are a part of the Cope collection in the American 
Museum of Natural History. The catalog number is 1025. The bones were collected for 
Professor Cope many years ago, apparently from Torrejon 
deposits, in New Mexico, by Mr. David Baldwin. The 
individual was a small one. 
A costal bone, believed to be the third, is 10 mm. wide 
and 3 mm. thick at the neural border. The seventh costal 
is 16 mm. wide at the distal end, 3 mm. thick at the sutural 
SS edge, and 4.5 mm. thru the ridge formed by the rib. 
On the hinder costals are seen 6 or 7 welts. The pits 
covering all the upper surface except the beveled free bor- 
der, are unusually small, there being § in a line 5 mm. long. 
The hinder lobe had a width of about 60 mm. at the 
base. The suture between the hypoplastron and the xiphi- 
plastron (fig. 629) is 27 mm.long. At the bridge the hypo- 
plastron is 8 mm. wide and 5 mm. thick. As in other 
species of the genus, there seem to have been no fontanels 
on the midline of the plastron. 
Fic. 629.—Plastomenus acupictus. There are no welts on the plastral bones and the pits 
Plastron of type. X 1. are somewhat smaller than on the carapace. 
neon 
Plastomenus catenatus Cope. 
Plate 86, fig. 1. 
Plastomenus catenatus, Cope, Syst. Cat. Vert. Eocene New Mexico, p. 35; Ann. Report Chief Engineers, 
1875, Append. LL, p. 1016 (of reprints, p. 96). 
Plastomenus multifoveatus, Cope, Wheeler’s Report Surv. West tooth Merid., 1877, Iv, p. 49, plate xxv, 
hg. I 
The fragment of costal plate on which Cope based the present species is in the U. 5. 
National Museum and bears the number 1138. It was discovered in the Wasatch Eocene 
beds, in the region of the Gallinas River, New Mexico. When Cope came to figure the speci- 
men, in 1877, he had come to the conclusion that it belonged to a species that he had already 
described from the Bridger beds of Wyoming, a species which he called P. multifoveatus, but 
which is here described as P. thomas. The present writer has examined the type of P. catenatus 
and has become convinct that it belonged to a species distinct from the Bridger form men- 
tioned. As the fragment has already been named, figured, and described, it appears to be 
best to retain for it ake original name and await the finding of additional materials from the 
type locality. Cope’s figure of the fragment is reproduced on plate 86, fig. 1 
The piece of costal is 25 mm. wide, 4 mm. thick. The ridges separating the pits are 
wider than in the case of P. thomasz, and the slope into the pits is more abrupt. Ina line 15 
mm. long there are 7 of the pits. In some cases two or more of them appear to have coalesct. 
Plastomenus? leptomitus (Cope). 
Plate 86, fig. 2; text-fig. 630. 
Trionyx leptomitus, Cope, Syst. Cat. Vert. Eocene New Mexico, 1875, p. 353 Append. Lr, Ann. Report 
Chief E ngineers, 1875, p- 1015 (separata, p. 95)5 Wheeler’s Surv. W. tooth Merid., tv, 1877, p. 44, 
plate xxv, figs. 27-31, plate xxvi, figs. 1-4.; Vert. Tert. Form. West, 1884, p. 118.—Kine SUD 
Geol. Explor. goth Parallel, Syst. Geol., 1, 1878, p. 377-—Hay, Bibliog. and Cat. Foss. Vert. N. 
A., 1902, p. 454. 
The known remains of this species were collected by Professor Cope in the year 1874, in 
deposits belonging to the Wasatch formation, in Rio Arriba County, New Mexico. These 
specimens are now in the U. 8. National Musews: at Washington, and bear the numbers 
