NORTH AMERICA AND THE WEST INDIES 39 



unable to determine any definite level-relationship among 

 them, (c) Near the entrance to the large cave I unearthed 

 with a trowel, in fine, soft, undisturbed material at the bottom 

 of a trench two feet deep, the femur of a ground sloth, and, 

 about 18 inches from it, a fragment of coarse dark pottery . . 

 the bone and pottery had every appearance of having been 

 deposited on the former surface of the cave floor and subse- 

 quently covered by the gradual accumulation of detritus . . 

 In general the ground sloth bones were associated with the 

 human remains in exactly the same manner as the bones of 

 Isolobodon and Plagiodontia, rodents which are positively 

 known to have been contemporary with man." The external 

 appearance of these animals may only be conjectured, for no 

 fragments of hide or hair are known to be preserved. 



LARGER HISPANIOLAN GROUND SLOTH 

 PAROCNUS SERTJS Miller 



Parocnus serus Miller, Smithsonian Misc. Coll., vol. 81, no. 9, p. 29, Mar. 30, 1929 



("In a large cave near St. Michel, Haiti"). 

 FIGS.: Miller, 1929a, pi. 7; pi. 8, fig. 2; pi. 9; yl. 10, figs. 2, 3. 



LARGE CUBAN GROUND SLOTH 



MEGALOCNUS RODENS Leidy 

 Megalocnus rodens Leidy, Proc. Acad. Nat. Sci. Philadelphia, 1868, p. 180 (Cuba). 



Miller, in describing the larger ground sloth from Haiti, be- 

 lieved there was good evidence that it lived to be the contem- 

 porary of man, since its remains were found in close association 

 with pottery and in layers of cave earth at no great depth. 

 Judging from the size of the few bones found, he surmised it to 

 have been an animal weighing upward of 150 pounds and more 

 heavily built that Acratocnus. The femur, on which the de- 

 scription mainly rests, is at once distinguishable by the absence 

 of the lesser trochanter, "as well as by its greater size and the 

 much more noticeable antero-posterior flattening of the upper 

 portion of the shaft." No skulls have yet been found suffi- 

 ciently well preserved to give much idea of the cranial characters. 

 An important feature of the humerus seems to be the lack of an 

 entepicondylar foramen, of which no trace is visible in the 

 figure published by Miller. The humerus measures 200 mm. 



