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28 - TRANSACTIONS OF THE 
the Laramie fauna as well as the strata form a transition 
series between the marine Cretaceous and the lacustrine 
Eocene Tertiary. The Mesa Verde, on the other hand, is 
overlain by marine Cretaceous strata, the Lewis Shale. 
Now let us compare the fossils found by Richardson 
and myself in the Book Cliffs Coal Field. 
COLLECTED BY. 
G. B. RICHARDSON. J. B. FORRESTER. 
Anomia micronema. 
Anomia gryphorhyncus ............. Anomia propatoris. 
BECHER is 2 eta ch ake Wisse lx © ab aie sos tate alls Ostrea glabra. 
REP ROM NC NO mi HN Mh a ll TUE Gh AL le Ostrea soleniscus. 
PATIOS IALICOSEAED 24/1 8. SS oie Modiola laticostata. 
Agog UTE ara fay i Pcs Ce RE A ee Corbula undifera 
Corpula, Subimigonalis. vse Ci... dicwts Corbula subtrigonalis 
Corbula cytheriformis ............ Corbula nematophora. 
PAN OUAiiel THOM DSONE vid ye wc SL Tulotoma thompsoni. 
(AUTO LESS a) a Ego Re a Unio holmesianus. 
CELTS CS) ISU le ae ene RRR a ae Oe Unio mendax. 
OIL CUEY <7 Rvs RAS a Unio brachyopisthus. 
REMERON ERTL CEI Hi) PRS Mises, A Sidial Gla SoReal reece wh eieteadc eee 
RE PrRNON Ni ESSENSE A UA. ert RO NS rly 10 ab cee Se 
Praiiscan (urrows: in wood Geos ale eke ele wie beaks 
Lingula sp. 
Cardium sp. 
Admetopsis subfusiformis. 
Viviparus trochiformis. 
Viviparus Panguitchensis. 
Planorbis planoconvexus. 
Physa copei. 
Sphaerium subellipticum. 
Melania wyomingensis. 
Cyrena securis. 
On comparing these with the list obtained in south- 
western Colorado one will see that there is a close agreement 
even to the species, thus showing that the fossils collected 
by Richardson and myself place the series of strata in the 
Laramie. In neither of these lists do we find any marine 
