40 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 66 
The animals represented in this collection are as follows: Mammoth 
(Elephas primigenius), bison, carabou, horse (two or more species), 
rhinoceros, musk-ox, wolverine, and wolf. 
The prize specimen of the collection is a finely preserved, almost 
complete skull of Elephas primigenius. It 1s of especial interest in 
that this is the only skull of the Siberian mammoth in any of our 
American museums. 
COLLECTING FOSSIL ECHINODERMS IN THE OHIO VALLEY 
The explorations for fossil echinoderms during the summer of 
1915, conducted under the supervision of Mr. Frank Springer, asso- 
ciate in paleontology in the U. S. National Museum, were limited to 
two areas of Silurian rocks in the Ohio Valley from each of which 
much valuable material was procured for the study of certain definite 
problems. In southern Indiana Mr. Herrick E. Wilson, under Mr 
Springer’s direction, spent a number of weeks quarrying for N1- 
agaran echinoderms, particularly crinoids, in the vicinity of St. 
Paul where numerous outcrops of the Laurel limestone occur. The 
object of this work was to secure as many specimens as possible for 
comparisons of this peculiar fauna with those from European Silurian 
rocks. Not only was much material obtained by the quarrying 
operations, but all of the local collections of fossils were purchased 
for Mr. Springer so that the Museum, which hitherto had practically 
no fossils from the Laurel limestone, 1s now in possession of a 
splendid general collection of fossils from this particular formation. 
The second area of exploration was in west Tennessee along the 
Tennessee River where Mr. W. F. Pate spent some weeks in searching 
for the peculiar crinoidal bulb, Camarocrinus, and the associated 
crinoid, Scyphocrinus, both of which Mr. Springer has proved to 
belong to the same organism. Mr. Pate was successful in finding 
several localities where excellent specimens of the Camarocrinus and 
Scvphocrinus were associated. Much material was secured and the 
specimens will be used in the preparation of Mr. Springer’s mono- 
graph upon this group of crinoids. 
GEOLOGICAL WORK IN PENNSYLVANIA AND VIRGINIA 
Dr. Edgar T. Wherry, assistant curator of the division of miner- 
alogy and petrology, U. S. National Museum, by arrangement with 
the U. S. Geological Survey, continued his studies of the geology 
of the Reading quadrangle in eastern Pennsylvania for a month dur- 
ing the summer. He completed the areal mapping of the Cambrian 
and Ordovician rocks of the region, and has transmitted to the Survey 
the manuscript of a report upon his work. He also mapped Cam- 
