UTAH ACADEMY OF SCIENCES 27 
LARAMIE. 
Beaver and Yellow Jacket 
Creeks. 
Anomia sp. related to A. 
micronema. 
Modiola laticostata. 
Corbiculas sp. related to C. 
subelliptica. 
Corbicula occidentalis 
Corbula undifera. 
Melania wyomingensis 
Ostrea sp. 
Unio holmesianus. 
Unio brachyopisthus. 
Unio verrucosiformis. 
Unio (two undescribed 
species. ) 
Campeloma sp. 
Neritina sp. 
MESA VERDE 
In Strata between Durango 
and Hesperus. 
Serpula sp. 
Serpula sp. 
Ostrea subtrigonalis. 
Inoceramus cripsii var. 
barabini. 
Pinna sp. 
Lucina. sp. 
Sphaeriola sp. 
Cardium bellulum. 
Cardium speciosum. 
Callista deweyi. 
Panopaea sp. 
Dentalium sp. 
Turrietella sp. 
Lunatia sp. 
Anchuria newberryi. 
Fasciolaria sp. 
Fusus sp. 
Odontobasis sp. 
Actaeon intercalaris. 
Baculites anceps var. ob- 
tusus. 
Baculites compressus. 
Placenticeras intercalare. 
It will be noticed that the Mesa Verde fauna has a 
distinct marine facies while that of the Laramie is fresh 
or brackish-water, and nowhere have we found the cephalo- 
poda, such as Baculites and Placenticeras, distinct marine 
forms, in the series I refer to the Laramie; neither do we 
find such marine forms as Pinna and Inoceramus. So the 
point for us to keep in mind is, “The Mesa Verde fauna is 
marine, the Laramie, fresh or brackish-water.” 
Without going into detail, I will say that the Tertiary 
Kocene which lies conformable on the Laramie, contains 
characteristic fresh-water forms, such as Viviparus paludi- 
naeformis, Goniobasis tenera, and Unio mendax. Thus 
