Progress of Vertebrate Palaeontology^Hay 33 
preparation of a section of this remarkable cave. This will 
show the bones as they were found in position. The animals 
were either washed into this cave or were dragged in by 
small carnivores. They include many living species of ani- 
mals, such as bears, pumas, foxes, wolves, deer, beaver, rab- 
bits, squirrels, mice, rats, bats and several kinds of birds, 
among them probably some extinct forms. There were dis- 
covered also remains of certain lizards, toads and frogs. The 
species of these animals were partly of living kinds, partly of 
kinds which have disappeared since this remarkable cave 
collection was deposited. As proof of its geological age, 
there were found also a skeleton of the saber-toothed tiger, 
recognizable although very much crushed, and the skeleton 
of a musk ox. Remains of a living species of peccary were 
also found. 
The third expedition was sent into the Oligocene bad- 
land.'-- of Cheyenne river, in South Dakota, and was in 
charge of Mr. A. F. Thompson of this Museum. Especial 
attention was to be paid to the collection of fossils from the 
Titanotherium beds, the fauna of which, excepting 
Titanotherium itself, is little known. This fauna is of espec- 
ial importance, as it will enable us to connect more closely 
the rich Mid-Oligocene fauna with the Upper Eocene 
(Uinta) fauna of Utah and to determine how far the Oligo- 
cene fauna is a product of evolution from known Eocene 
types and how far of immigration from regions whose 
Eocene fauna is not yet discovered. 
]\Ir. Thompson had considerable success in the Titano- 
'.herium beds, and secured some excellent specimens from 
the Oreodon beds also. The collection includes skulls and 
fragmentary skeletons of at least three new genera, two 
titanothere skulls, seven rhinoceros skulls, and various 
other specimens of less importance, but representing sev- 
eral new species. Three fine specimens of turtles were se- 
cured, two of which are new. The number of catalogued 
specimens is 125. 
The curator of the department of vertebrate palaeonto- 
logy, Prof. H. F. Osborn. spent a portion of the summer in 
Europe, visiting various museums and attending the Zoolo- 
gical Congress at Bern and the rneeting of the British Asso- 
