Baur.] ^^^ [May 5, 



There is a shell of the same species in the Philadelphia Academy, No. 

 247. It has the Smithsonian Institution number 7173 and was collected 

 near Old Fort Cobb, I. T. The soft parts, limbs and head are preserved 

 in alcohol at the Smithsonian. The two specimens mentioned by Agassiz 

 are also at the Smithsonian (No. 80, Guadalupe mountains, Pecos river, 

 Texas, and No. 76, New Leon, near Cadereita, Mexico) and belong to 

 this species. 



I consider Pseicdemi/s texana as the representative of Pseudemys in the 

 southern portions of this country west of the Mississippi — Texas, Indian 

 Territory, Northern Mexico. 



Pseudemys ruhiventris LeC, Baur. 



This species has been first mentioned by Say,* who described it erro- 

 neously as Emys serrata Daudin, in 1835. LeConte f introduced it as a 

 new species under the name of Testudo ruMce>itris LeC, the "red-bellied 

 terrapin, vulg." According to LeConte, it inhabits "in rivers from New 

 Jersey to Virginia, chiefly in such as are rocky." He says that they are 

 very numerous in the Delaware, near Trenton ; specimens from this 

 locality may be considered as typical, therefore. 



In this form both jaws, especially the lower one, are strongly serrated ; 

 the upper one is notched mesially and has a cusp on each side ; the lower 

 jaw has a strong, median, serrated cusp and a notch on each side of it. 



Pseudemys alabamensis, sp. nov. 



In the collection of Mr. Gustave Kohn, of New Orleans, La., I found 

 two specimens from Mobile, Ala., which are closely allied to P. ruhiven- 

 tris. They are at once distinguished, however, by their much more 

 arched shell. This species has been noted by Agassiz as Ptychemys mo- 

 biliensis. It is, however, totally different from this, having the structure 

 of the skull of Pseudemys rubiventris LeC. The shell is much more 

 arched than in P. rubiventris ; the coloration is like that in the latter 

 form, but the plastron is yellow, or yellow with brown reticulations or 

 dots. 



Locality of types, Mobile bay, Ala. Collection of Mr. G. Kohn, New 

 Orleans, La. This species exists in diflerent museums, with the name P. 

 mohiliensis Holbr. 



Pseudemys mobiliensis Holbr. 



The types of this species are from Alabama and are Nos. 341 and 243 

 of the Philadelphia Academj^ collection. I have examined the types and 

 found that they are very close to P. conciniia LeC. The skull agrees ex- 

 actly with that of P. conciana, but is considerably larger. Tliere is no 

 notch in the upper jaw and no lateral cusps ; the lower jaw only has a 



*Say, Thomas, " On the Fresh-water and Land Tortoises of the United States," Joum. 

 Acad. A'a<. Sc, Philad., Vol. iv, Part 2, 1825. 

 t LeConte, J., I. c. 



