Persoiiiil (111(1 Scienft\tic Xcirs. 61 
stance was formed on tlie eilge of the KiJaiiea crater, asisoci- 
atecl with sulphur. 
Prof. Edw. D. Cope exhibited the slcull of a whale from the 
Miocene of the Yorktown epoch. It adds another species to 
the whale-bone whales and established their descent from the 
Zeuglodonts. The elongation of the parietal and frontal bones 
is characteristic. The form is allied to the genus Cetotherium 
and is described under the name Cephalotropis coronatus. 
Geological Society of VVASHi?«(iToN. 
At the JrOth meeting held May 13, the following communi- 
cations were presented : 
Th(! Faunal Belations of the Eocene and Upper Cretaceous on the 
Pacific C<jast. T. W. Stanton, U. S. G. S._ The Chico-Tejon series has 
been described as a continuous series showing a gradual transition both 
faunally and stratigraphicaily from the Cretaceous into the Eocene, the 
close faunal connection being found especially in the " Martinez group" 
(an ujjper sub-division of the Chico) and in " Intermediate beds.'" A 
study of the faunas and stratigraphy, esjjecially in middle California, 
has proved that the intermediate beds and the upper part of the Mar- 
tinez group are identical and that they form a lower zone of the Tejon, 
or Eocene. When the line between the two formations is thus located 
their faunas are but little more closely related than the Upper Cretace- 
ous and Lower Eocene faunas of other parts of the world. With the 
exception of an ammonite, of which a few specimens were reported from 
the Tejon in early collections, the few species that seem to be identical 
in the two formations are persistent types that have come down to the 
present day with little change. 
The structure and age of the Cascade Range. J. S. Diller, U. S. G. S. 
The two sections of the Cascade range afforded by the Klamath and 
Columbia rivers expose volcanic rocks only, and indicate that the range 
where most typically developed is composed essentially of lava from top 
to bottom. As far as yet known it has no core of older metamorphit- 
rooks on which the line of volcanoes developed. 
The auriferous slate series occursonthe western slope of the Cascade 
lange about the head of the Umpqua where it is impinged l)y the 
Klamath mountains. These older rocks belong to the Klamath moun- 
tains. They strike northeast towards the Blue mountains of eastern 
Oregon and make a large angle with the general trend of the Cascade 
range. 
At Ashland in southern Oregon, the relation of the Cascade range to 
the Klamath mountains is better exposed. The}' are separated })y Rogue 
river valley which is cut chiefly in Cretaceous strata. Overlying these 
with apparent conformity and dipping gently to the eastward Ix'ucath 
the Cascade range are similar sedimentary rocks containing silicified 
wood, referred by Mr. Knowlton to a period certainly later than the 
Cretaceous. Above these and conformable with them on the western 
slope of the Cascade range are numerous sheets of lava and tutf. A tuff 
near the base of the series contains Miocene leaves. Although the vol- 
canic activity of the Cascade range may have been initiated in earlier 
times, the period of greatest eruption and the upbuilding of the range 
occurred during the Neocene. 
An eartij Date for Glaciation in the Sierra Nevada. Willard 1). 
Johnson. The author desciil)ed the occurrence of striated jx-bbles, of 
fcjreign material, in the extensive audesite-tutf flows, or volcanic mud 
flows of the Sierra, and gave reasons for regarding the striaticMi of these 
included pebbles as probaVily glacial. He then called attention to a cer- 
tain anomalous topography of the siunmit region of the range, and 
