No. 2328. PLEISTOCENE VERTEBRATES IN UNITED STATES— HAY. 109 



great trochanter is 78 mm. ; in the fossil this measurement is 76 mm. 

 The lesser trochanter is not so strongly developed as in the tiger 

 femur at hand. 



FELIS COUGUAR? Kerr. 



In the collection there is a fragment (Cat. No. 9215) of the left 

 Tamus of a lower jaw of a felid which may have been that of the 

 species here described. It contains the roots of the sectorial, but the 

 crown is gone. The height of the jaw is 21 mm. at the sectorial; its 

 thickness is 9 mm. These are almost exactly the height and thick- 

 ness of the jaw of a mountain lion (No. 21078, U.S.N.M.). 



4. COLLECTION FROM ALTON, ILLINOIS. 



In the United States National Museum there is a very considerable 

 collection of Pleistocene mammals that was made many years ago 

 by Hon. William Mc Adams, of Alton, Illinois. He reported briefly 

 on this collection at the Minneapolis meeting of the American As- 

 sociation for the Advancement of Science, in 1883.^ He stated that 

 the " bluff clays," now called loess, were nearly 100 feet thick at 

 Alton, and were remarkably rich in animal remains, such as teeth 

 and bones, attached to calcareous nodules or clay stones. Remains of 

 13 different species had been found, all probably extinct. 



It appears that McAdams's collection was secured for the United 

 States Geological Survey by Prof. O. C. Marsh. It remained at 

 Yale University many years without being studied. On Professor 

 Marsh's death the collection was brought to the National Museum, 

 and the writer has the privilege of examining it. As stated by 

 McAdams, the specimens of bones and teeth are attached to, or rather 

 are partly or wholly inclosed in, hard nodules. These nodules are 

 composed of very fine grains of sand cemented together by calcium 

 carbonate. The material is very compact, and there is extreme dif- 

 ficulty in removing from it the fossils without injuring the latter. 

 In the collection the writer has found the following species. The ex- 

 tinct forms are indicated by the dagger. 



^Megalonyx je-ffersonii. \Bison, sp. indet. 



\Equus^ sp. indet. \Mammut amerlcanum. 



\Platygonus comypressus? Marmota monax. 



\Sangamona fugitiva. Castor canadensis. 



\GervalGes roosevelti? \Castoroides ohioensis. 



\Rangifer muscatinensisf Geomys bursarius. 



\Taurotragus nmericamis. Ursus americanus. 

 \Sym'bols promptusf, new species. 



Of the 15 species here identified there are 11 which are now ex- 

 tinct — 75 per cent. This high percentage of extinct forms is prob- 



» Proc. Amer. Assoc. Adv. Sci., vol. 22, p. 268. 



