NO. 10 SECOND REPORT ON FOLSOM COMPLEX ROBERTS 33 



IDENTIFICATION OF BONES AND MOLLUSKS 



A number of animals, in addition to the bison, are represented by 

 the bones found at the Lindenmeier site. As mentioned in the dis- 

 cussion of the bison pit, Dr. Gazin has identified the remains of that 

 animal as a form of Bison taylori, one of the extinct species. The 

 other bones were submitted to Dr. Remington Kellogg, assistant cu- 

 rator, division of mammals, United States National Museum, who 

 made the following identifications : 



Fox, Vulpes velox. 



Wolf, Canis nubilus. 



Rabbit, Lepus townsendii campanius. 



Pronghorn (Rocky Mountain antelope), Antilocapra aniericaiia. 



The fox, wolf, and rabbit were represented in the material obtained 

 in 1934, but the antelope was a 1935 addition. The bison is the only 

 extinct animal in the group. There has been no change in the others 

 from the time of the Pleistocene ; hence they throw no light on the 

 problem of the age of the site. 



The invertebrate material was submitted to Dr. Horace G. Richards, 

 research associate, New Jersey State Museum. The specimens and 

 his identifications were checked by Dr. H. A. Pilsbry, of the Academy 

 of Natural Sciences of Philadelphia. Dr. Richards found nine species 

 represented in the mollusks. They are : 



Gasfrocopfa armifera Say. 

 Gastrocopta ashmiini Sterki. 

 Pupilla muscarum (Linne). 

 Pupoidcs inornatus Vanatta. 

 Pupilla sonorana Sterki. 

 Vertigo sp. 



Valonia gracilicostata Reinh. 

 Succinea avara Say. 

 Zonitoides arborea Say. 



Seven of these species live in the region today. Two of them are 

 considerably north of their present northern limits. Gastrocopta ash- 

 muni Sterki has its present northern limits at Grand Canyon, Ariz., 

 and southern and central New Mexico. The other, Pupilla sonorana 

 Sterki, has a present northern limit of Mora County, N. Mex. Ac- 

 cording to Dr. Richards, this northern occurrence of the two species 

 may indicate a warmer climate at the time of the deposition of the 

 fossils." 



" Letter from Dr. Richards to the writer, Dec. 14, 1935. 



