140 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



tibia (Cat. No. 9237) is represented by the upper two-thirds of the 

 shaft. Its side-to-side diameter is only 40 mm. 



A right femur (Cat. No. 9238) of a young elephant has lost the 

 head of the bone (not yet united to the shaft), the great trochanter, 

 and somewhat of the lower end of the shaft. The total length of the 

 fragment is now 280 mm. It was originally somew^hat more than 

 300 mm. long. Measured across the upper end at the plane of union 

 of the epiphysis w ith the shaft the width is 103 mm. The greatest 

 diameter at the middle of the shaft is 43 mm. ; the least diameter, 33 

 mm. A left femur (Cat. No. 9239), presenting only the upper half 

 of the shaft, is slightly larger and must have belonged to another 

 individual. These bones are heav}^ and well mineralized. 



A right ulna of a proboscidean, probably an elephant, is repre- 

 sented by the shaft lacking the olecranon and about the lower third 

 of the bone. A left ulna presents about the upper fourth of the 

 bone lacking the olecranon. They probably belonged to one indi- 

 vidual and have the catalogue number 9240. The width across the 

 surface for the humerus is 115 mm. The greatest diameter at about 

 the middle of the shaft is 55 mm. ; the least, 47 mm. 



Three bones of a large elephant (Cat. No. 9246), a dorsal verte- 

 bra without its arches and processes, the lower end of a left humerus,, 

 and the lower end of the right tibia are in the collection. The verte- 

 bral centrum is heart-shaped, the depth from the floor of the spinal 

 canal to the lower border being 125 mm. or more ; the width, taken at 

 the bottom of the articular cavities for the ribs, 100 mm. The width 

 across the lower articular surface of the humerus was more than 170 

 mm. The width of the articular surface for the astragulus was 

 130 mm. 



Family CRICETIDAE. 



PEROMYSCUS. sp. indet. 



A single lower incisor tooth (Cat. No. 9247) is all in the collection 

 that represents this genus. 



Family GEOMYIDAE. 



GEOMYS TEXENSIS? C. 11. Merriam. 



This species is believed to be represented by an upper incisor and 

 the right side of a lower jaw, containing the incisor and part of one 

 molar (Cat. No. 9248). 



Family HETEROMYIDAE. 



PERODIPUS, sp. indet. 



The genus Perodipus is represented in the collection by two upper 

 incisors. 



