3Ieso.zoic and Ccenozoic Geology and PalcBoatology. ISl 



diegoana, Crucihulum spinosum, Trochita diegoana ; from Monterey 

 county, eighteen miles sontli of Tres Pinos, Aleretrix uniomeris; from 

 the Tulare valley, Iferetrix tularana, Area microdonta, Purpura pe- 

 trosa ; from CavmeWo, Liitraria traskei ; from sixteen miles south of 

 Tres Pinos, Modiola contracta, now Volsella contracta; from Carrizo 

 Creek, Pecten deserti, and Ostrea heermanni. 



He described, from the Post-pliocene at San Pedro, Tellina ped- 

 roana, Saxicava abrupta^ Petricola pedroana, Schizothcerus nuttalli, 

 Mgtilits pedroanus, PenUella spehsa, .N'assa interstriata, N. pedro- 

 ana^ Oliva pedroana, Littorina j)Qdroana, and from Santa Barbara, 

 Crepidula jyrinceps. 



W. P. Blake estimated the thickness of the Eocene, at the southern 

 end of the Tulare valley, at 2,000 feet. The strata are chiefly argilla- 

 ceous sandstone. T. A. Conrad described, from the Canada de las 

 Uvas, Cardium linteum, now Cymhophora lintea, Dosinia alta, 

 Meretrix californiana, 31. uvasana, Crassatella alta, C. uvasana, 

 3Iytilus humerus^ Natica alveata., now Ariipullina alveaia, Turritella 

 uvasana, VolutiUthes californianus, Busycon blakei^ now Perissolax 

 blakei, and Clavatiila calif ornica. It is quite likely that part or all 

 of the strata referred to the Eocene from which these fossils were 

 collected, belong to the Cretaceous. 



He described.* from the Miocene, at Santa Barbara, California, 

 Janira beUa, 3Iulinia densata, Area canalis, A. trtUneata, Axinoea 

 barbarensis ; from Santa Clara, Schizopyga californiana : from Estrel- 

 la valley, Palliiun estrellanum, now Lyropecten estrellanum,lSpondylus 

 estrellensis ; from Monterey county. Pallium crassicordo, now Lyro- 

 pecten crassicordo, Thracia mactropsis, 3Iya montereyana^ Arcopagia 

 medialis, Cryptomya ovalis, Cyclas tetrica, Dosinia alta, D. longula, 

 I'amiosoma gregaria, Astrodapsis ant is ell i ; from San Raphael Hills, 

 Pecten nieeki, P. altipjlicatus ; from Santa Inez Mountains, Pachy- 

 desma inezanum ; from Ranche Triumpho, near Los Angelos, Lutraria 

 transmontana ; from other places in California, Area congesta, Tapes 

 linteatum ; and from Texas, 3Iellita texana. 



Dr. Leidy described, from the Bad Lands of Nebraska, Hipparion 

 occidentale, now Uippotherium occidentale, Hyopotamiis americanus, 

 Lept.auchenia decoi a, L. major, Leptochcerus spebtabilis, Steneofiber 

 nebrascejisis, Ischyromys typus, Paloiolagus haydeni, JEumys elegans, 

 Aniphicyou gracilis, Agriochoirus major, Enteledon ingens, now 

 Elotherium ingens, Palmochcerus probus, now Perchcerus probus ; 



* Proc. Acad. Nat. Sci., vol. viii. 



