NO. 12 MAMMALS FROM CUBA AND SANTO DOMINGO MILLER 9 



middle of molar series, about 17.4; maxillary toothrow (alveoli), 

 10.8 ; crown of m^, 2.6 x 2.6. 

 Specimen examined. — The type. 



RODENT. Genus? 



The perfect left femur of an adult rodent collected by Mr. de Booy 

 at Macoris is more slender than the corresponding bone in Isolohodon 

 or Plag^iodontia, the shaft is more compressed below, the great 

 trochanter is narrower and the small trochanter is more abruptly 

 emarginate on its lower border. In these peculiarities it is not 

 approached by any individual among the numerous specimens by 

 which the other genera are represented. As compared with the 

 femur of Brotomys it differs chiefly in its much greater size (length 

 to extremity of large trochanter 59.4 instead of 46 ; greatest diameter 

 at middle 7 instead of 5.6; least diameter at middle 5.6 instead of 

 4.0). It may represent a large species of Brotomys or an unknown 

 genus. 



RODENT. Genus? 



The incomplete right femur of a rodent collected by Dr. Abbott 

 in a cave one-quarter of a mile from the shore at San Lorenzo prob- 

 ably represents another unknown species or genus. It is about the 

 size of the femur last described, and the small trochanter is even 

 more abruptly emarginate on its lower border. The striking pecu- 

 liarity of this bone as compared with the femur in all the other 

 Santo Domingan rodents is seen in the region lying between the 

 upper surface of the small trochanter and the deepest portion of the 

 digital fossa. The groove which occupies this area is usually not 

 far from horizontal, that is, about perpendicular to the shaft of the 

 femur. In this specimen it slopes upward at an angle of about 65°. 

 The bone in question appears to be partly mineralized, while all 

 the others in both collections seem essentially fresh. 



TRICHECHUS sp. 



A seacow is represented by a rib, a caudal vertebra, and the neural 

 spine of a lumbar vertebra, all found at Macoris. The material at 

 hand is not sufficient to make any positive determination possible. 



