150 FOSSIL TURTLES OF NORTH AMERICA. 
measure 48 mm. each, while the concave visceral face is 22 mm. wide. The mouth of the pit 
is circular. 
Cope referred to this species a specimen which now has the number 2351 of the American 
Museum and which is regarded here as belonging to the species since described by Wieland 
as Propleura borealis, here as Osteopygis borealis. If all of the peripherals described by Leidy 
belong to the same species this can not be the same as Cope’s species; for the peripheral here 
represented by fig. 181 is too long and narrow. Furthermore, the peripheral with the missing 
costal border is too thick. In ‘he doubt, therefore, it seems best to regard Leidy’s materials 
and Cope’s as belonging to distinct species, making the elongated peripheral of Leidy’s spec- 
imens the type of his species and leaving it to future discoveries to determine whether or 
not any of Leidy’s materials are co-specific with Cope’s specimen. 
Genus CATAPLEURA Cope. 
A genus not well known. Nuchal bone little broader than the anterior peripherals. 
Nuchal and first and second peripherals suturally joined to the first costal bone. The other 
peripherals to the eleventh probably not suturally connected with the disk of the carapace. No 
pit in the second peripheral for the hyoplastron. A pit in the eleventh peripheral for the rib of 
eight costal. Plastron probably resembling that of Osteopygis, but not extending so far along 
the peripherals. 
Type: Catapleura repanda Cope. 
This genus differs from Lytoloma in having the two anterior peripherals solidly joined to 
the first costal. It differs from Osteopygrs in the much narrower nuchal bone and in having 
no pit in the second peripheral for the process of the hyoplastron. From both Lytoloma and 
Osteopygis it differs in the much thicker posterior peripherals. 
The genus was establisht by Cope in 1870 (Ext. Batrach., Reptilia, Aves N. A., p. 
143). On page 235 of the work cited Cope exprest himself in doubt whether there were 
nine or ten costal plates present. In 1884 (Vert. Tert. Form. West., p. 112) doubt is exprest 
whether there were g costals. There can now be no doubt that this genus, like Osteopygrs 
and the great majority of turtles, had only 8 pairs of costals. 
Catapleura repanda Cope. 
Figs. 185-188. 
Osteopygis repandus, Cops, Proc. Acad. Nat. Sci. Phila. 1868, p. 147 (nom. nud.).—Hay, Bibliog. and 
Cat. Foss., Vert. N. A., 1902, p. 441. 
Propleura repanda, Corr, Cook’s Geol. New Jersey, 1868 (1869), p. 735 (nom. nud.). 
Catapleura repanda, Cope, Ext. Batrach., Reptilia, Aves N. A., 1869, p. 143, plate vii, fig. 2; Vert. Cret. 
Form. West, 1875, p. 259- 
The present species is based on very meager materials and none additional has been 
discovered since the first description of the species. The type is now in the American Museum 
of Natural History and consists of a part of the nuchal, the succeeding three peripherals and a 
part of the fourth of the right side, the first of the left side, and four other peripherals, one 
nearly complete costal and parts of others, and a portion of a femur. The catalog number is 
2353. These bones were obtained from the upper bed of Cretaceous greensand at Barnesboro, 
Gloucester County, New Jersey. 
The nuchal bone (fig. 185) is remarkable for its narrowness fore and aft, being only 47 mm. 
The widths of the first and second peripherals are respectively 43 mm. and 44 mm. The 
free border of the nuchal is somewhat obtuse and the thickness soon becomes IO mm., at 
the end of the bone. The posterior border articulated suturally with the first costal. The 
posterior sutural edge is oblique to the surfaces of the bone and the nuchal slightly overlapt the 
first costal. The thickness of this border is 8.5 mm. The posterior border of the nuchal was 
much wider from side to side than the anterior border. On the end of the nuchal, nearer the 
anterior border, there is a notch which receives a process of the first peripheral (fig. 185). 
The latter measures 50 mm. along the anterior border, 17 mm. along the posterior. Its free 
border is more obtuse than that of the nuchal. The second peripheral (fig. 185) extends 53 
mm. along the free border. It is 13 mm. thick near the free border, 7 mm. thick at the hinder 
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