255 



An isolated iippcr secuiul molar of Biison laufrons^ found in association 

 with remains of Mastodon ainericanus and Equus major at Pittstown, on the 

 Susquehanna River, Luzerne County, Pennsylvania, is represented in Fig. S, 

 Plate XXVIII. It is considerably worn, the usual median internal fold of 

 the tooth, in a less worn condition, being seen in the specimen as an 

 oval islet. 



The fore and aft diameter of the specimen is 16.j lines, and its transverse 

 diameter at the triturating surface I'/ lines. 



A specimen of a last inferior molar of a Bison, represented in Fig. 4, 

 Plate XXXVII, and a metacarpal bone of the Megulonyx Jeffersoni, 

 presented to the Academy l)y Dr. Edward D. Kittoe, of Galena, were 

 obtained, together with some additional bones, from a crevice of the 

 lead-bearing rocks, at a depth of 130 feet from the surface, near 

 Elizabeth, Jo Daviess County, Illinois. The tooth is about the size of 

 that of the recent bulfalo, and may pertain to that species, though it is not 

 improbable it may have belonged to a small individual of Bison latifroiis. 



The specimen is but little worn. The length of the crown at its fore part 

 is '2| inches ; its breadth 23 lines ; its thickness at the base anteriorly 10 

 lines ; and near the triturating surface 7 lines. 



AUCHENIA. 



AUCIIENIA HESTERNA. 



In the Proceedings of the Academy of Natural Sciences for 1870, page 

 125, the writer described some fossil remains from California, submitted to 

 his inspection by Professor J. D. AVhitney. Among the fossils were several 

 which were attributed to a large extinct llama, with the name of Auchenia 

 californka. The specimens upon which the species was founded consisted 

 of a metacarpal l)one, the fragment.of another, the proximal end of a femur, 

 an acetabulum, and portions of a tiliia. The species indicated was much 

 larger than the camel, as the head of tlie femur is 3 inrlios in diameter, and 

 the metacarpal is 19 inches long, whereas the latter in the camel is but 13 

 inches long. 



In the Philosophical Transactions of London for 1870, Professor Owen 

 has described some remains of a large extinct llama from Mexico, under the 

 name of Palauchcnia magna. This animal approximated in size the camel, 

 whereas the remains attributed to Auchenia californica much exceeded it. 



Of the remains referred by Professor Owen to Palauchenia, there is a 



