Publications of Scientific Societies. 47 



referred by Conrad to the Eocene and by Gabb to represent the 

 uppermost member of the Cretaceous (Division B of the California 

 Reports), cSn be found in the following papers : 



Conrad. Am. Jour, of Conchology, Vol. I (1865), pp. 362-5 ; Vol. II 

 (1866), pp. 97-100; Am. Jour. Sci., Vol. XLIV (1867), pp. 376-7. 



Gabb. Am. Jour, of Conchology, Vol. II (1866), pp. 87-92; Am, 

 Jour. Sci., Vol. XLIV (1867), pp. 266-9; Proc. Cal. Acad. Nat. Sciences, 

 Vol. Ill (1867), pp. 301-306. 



Heilprin, in his article on the age of the Tejon rocks, etc., Proc. 

 Acad. Nat. Sci., Phila., 1882, p. 196, remarks, in a footnote, " that Con- 

 rad finally yielded his position, but he has been unable to discover 

 the evidence of such a change of opinion in any of that author's 

 writings." 



Descriptions of some secondary fossils from the Pacific States; 

 by W. M. Gabb. Amer. Jour. Conch., Vol. 5, 1870, 

 pp. 5-18, pis. 3-7. 



Orthoceras Blakei, Gabb; Ammonites Nevadanus, Gabb; A. Colfaxi, 

 Gabb ; A. Billingsianus, Gabb? ; Turho regius, Gabb ?; T. elevatus, Gabb ; 

 Pholadomya multilineata, Gabb ; P. Nevadana, Gabb ; Goniomya aperta, 

 Gabb ; Myacites depressus, Meek ; Cardium arcxformis, Gabb ; Astarte 

 appressa, Gabb ; Cardinia ponderosa, Gabb ; Posidonomya Blatchleyi, 

 Gabb; Pinna, sp.; Crassianella lingidata, Gabb; Lima {Plagiostoma), 

 sp. undt.; Monotis circularis, G&hh; Pecten acutiplicatus,Meek; Plica- 

 tula perembricata, Gabb ; Spirifer obtusus, Gabb. 



The author publishes the opinion that all the Jurassic deposits of 

 the Sierra Nevada and their vicinity were probably of Triassic age. 

 (page 5.) 



THE AMERICAN NATURALIST. 



Published in Philadelphia. 



Remarks on fossil shells from the Colorado Desert ; by Robert 

 E. C. Stearns. Am. Nat., Vol. 13, No. 3, March, 1879. 



The author illustrates Physa humerosa, Gould ; Tryonia protea, and 

 varieties semi-fossil from Colorado Desert, California; Anodonta 

 Calif orniensis, Lea; Avmicola longinq'ua,Go\x\A; Anondonta, Owens 

 River, Cal. ; Anodonta, Bear River, Utah. 



Mountain upthrusts; by C. A. White. Am. Nat., Vol. 22, 1888, 

 pp. 399-408. 



Notes on the glaciation of Pacific Coast; by G. F. Wright. Am. 

 Nat., Vol. 21, 1887, pp. 250-256. 



Mesozoic and Cenozoic realms in North America; by E. I). Cope. 

 Am^ Nat., Vol. 21, 1887, pp. 44-5-462. 



