Mesozoic and Cainozoic Geology and Paloeontology. 279 



diegoana, Criicibulum spinosum, Trochlta diegoana ; from Monterey 

 count}", eighteen miles south of Tres Pinos, Meretrix imiomeris; from 

 the Tulare valley, Meretrix tidarana, Area microdonta^ Purpura pe- 

 trosa ; from Carraello, Lutraria traskei ; from sixteen miles south of 

 Tres Pinos, 3Iodiola contracta, now Volsella contraeta; from Carrizo 

 Creek, Pecten deserti^ and Ostrea heermanni. 



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

 roana, Saxicava ahrupta^ Petrlcola pedroana^ Schizothcerus nuttalli^ 

 Mytilus pedroanus, Penitella spelcea^ N'assa interstriata, N. pedro- 

 ana, Oliva pedroana, Littorina pedroana, and from Santa Barbara, 

 Crepidula princeps. 



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, 3f. uvasana, Crassatella alta, C. uvasana, 

 3fytilus humerus^ JSTatica alveata^ now Ampullina alveata, Turritella 

 uvasana, Volutilithes calif ornianus, Busycon hlakei^ now Perissolax 

 blakei, a^id Clavatula calif ornica. It is quite likel}" 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 bella, 3IuUnia densata, Area canalis, A. trilineata, Axincea 

 harharensis ; from Santa Clara, Schizopyga calif orniana ; from Estrel- 

 la vallej^, Pallium estrellanum, now Lyropecten estrellamum, Spondylus 

 estrellensis ; from Monterey count}^ Pallium crassicordo, now Lyro- 

 pecten crassicordo, Thracia mactj^ojjsis, Mya montereyana^ Arcopagia 

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

 Tamiosoma gregaria, Astrodapsis antiselli ; from San Raphael Hills, 

 Pecten meeki, P. altipUcatus ; from Santa Inez Mountains, Pachy- 

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

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

 Unteaturn ; and from Texa«, Mellita texana. 



Dr. Leid}^ described, from the Bad Lands of Nebraska, Hipparion 

 occidentale, now Hipp other ium occidentale, Hyopotamus americanus, 

 Leptauchenia decora, L. major, Leptochoerus spectahilis, Steneofiher 

 nehrascensis, Ischyromys typus, Pakeolagus haydeni, Enmys elegans, 

 Amphicyon gracilis, Agriochoerus major, Enteledon ingens, now 

 Elotherium ingens, Paloeochmrus prohus, now Perchoeyms probus ; 



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



