612 PROCEEDINGS OF THE WASHINGTON MEETING 



those most likely to have prevailed, it sesma quite probable that NemorJiosdus, as 



an element of the North American fauna, belonged to the Champlain phase of the 

 Glacial epoch. 



The finding of goat-antelopes as members of an extinct fauna of the Rocky 

 mountains, while it was quite unexpected, is no more remarkable than that ele- 

 phants, which, not only by present habitat but also by the very place of their 

 origin from the mastodon stock, are Asiatic types, abounded in Pleistocene times 

 throughout all North America, to which the Asiatic fauna doubtless had measur- 

 able access by way of lands now interrupted in the vicinity of Bering strait. The 

 Asiatic mammoth, Elephas primigenius var. primigenius, occurs in trans-sierran 

 America, and elephant remains of an extinct species, related to the mammoth and 

 to the modern Asiatic rather than to the African elephant, are common on the 

 Great plains and have been found in the Rocky mountains as high, at least, as the 

 bogs of Grassy gulch in the Cripple Creek mining district. 



The cave fauna of Glen Eyrie was first publicly described in a popular lecture 

 delivered by the writer before the Colorado College Scientific .Society on the 27th 

 of October last, and which was printed in the Colorado Springs Gazette of Novem- 

 ber 12. 



The writer wishes to acknowledge his indebtedness in this connection to the 

 departments of the National Museum in charge of Messrs F. A. Lucas and F. \V. 

 True for facilities of study granted, and particularly to Mr Marcus W. Lyon, Jr., 

 who personally assisted him in comparing the Glen Eyrie cave specimens of 

 Nemorhcedtis and Arctomys with recent osteological material. 



The seven following papers were read by the authors: 



GROUND SLOTHS IN THE CALIFORNIA QUATERNARY 

 BY JOHN C. MERRIAM 



Among the vertebrate fossils which have been brought to light in middle Cali- 

 fornia within the past year there are two specimens which are of more than ordi- 

 nary interest, as they indicate the existence of that peculiar group of mammals 

 known as ground sloths in this region, within comparatively recent times. The 

 first of these specimens to become known was a large humerus, received by the 

 writer for determination from Mr A. Huff, who had found it near Hamlet station, 

 on the east side of Tomales bay. In August last the writer visited Hamlet in 

 order to determine if possible the exact occurrence of the humerus, but was not 

 able to do so, owing to the.absence of Mr Huff. Two months later Mr F. C. Calk- 

 ins visited the locality at the writer's request and examined the spot from which 

 the humerus was taken. To Mr Calkins I am indebted for the exact data relating 

 to its occurrence. 



The place pointed out to Mr Calkins as that from which the humerus was ob- 

 tained is in a small run about three-quarters of a mile southeast of Hamlet and 

 about 100 feet above the level of the bay. The stream in the run has cut down 

 quite sharply for about 12 feet into a loose, sandy clay at the spot where the speci- 

 men was obtained. Above this point it Hows through or over deposits similar to 

 those just mentioned, and over rocks of the Franciscan series, so that the speci- 

 men must be derived from one or the other of these formations. As the Francis- 

 can rocks are of middle Mesozoic age and have suffered much disturbance, the 



