46 A Bibliography of the Geology, etc., of California. 



AMERICAN JOURNAL OF CONCHOLOGY. 



Published at Philadelphia. 

 A'ol. 1, 1865— Vol. 7, 1871. 



Observations on certain Eocene fossils described as Cretaceous 

 by Mr. W. M. Gabb in his report published in the Palaeon- 

 tology of California; by T. A. Conrad. Am. Jour. Conch., 

 Vol. 1, 1865, pp. 362-365. 



The author remarks that Mr. Gabb makes two divisions of his Cre- 

 taceous strata, A and B. The former is, doubtless, Cretaceous ; and 

 the latter, I am sure, will prove to be older Eocene. Fusus Califor- 

 nicus, Gabb, the axithor does not recognize as "my ? Clavatula C'ali- 

 fornica." Volutilithes Navarroensis belongs to "my genus Rostellites." 

 Fusus Remondi is a species of Perissolax allied to P. penita. Amaurop- 

 .ns alveata is a species of Globularia. Fisciis mamiUatv.s is probably 

 Sycotypus modestus, Conrad. Perissolax is a genus nearly related to 

 Sycotypus. Chemnitzia Spillmani is very distinct from any species I 

 described under that name. Atiiria Mathewsoni is Atuira zic-zac, 

 Dosinia elevata is Dosineopsis alta. D. Uvasana is Dione ovata, Rogers. 

 Meekia sella is probably Cyjirina bisecta. M. navis is a species of Yoldia. 

 Mactra Asburneri is propbably M. albaria, Conrad. Nucula truncata — 

 two species are evidently confounded under this name. Leda pro- 

 texta .?— there are two species here united, neither of which is the 

 protexta — one Eocene, the other Cretaceous. 



A reply to these criticisms of Mr. Conrad is given by ^Ir. W. M. 

 Gabb in the second volume, pp. 87-92. 



Reply to Mr. Conrad's criticism on Mr. Gabb's report on the 

 Palaeontology of California; by W. M. Gabb. Am. .Jour. 

 Conch., Vol. 2, 1866, pp. 87-92. 



Further observations on Mr. Gabb's Palasontology of California; 

 by T. A. Conrad. Am. Jour. Conch., Vol. 2, 1866, pp. 

 97-100. 



The author remarks that Volutilithes Navarroensis has the external 

 sculpture and form of a species of Rostellites found in New Jersey. 

 Perissolax, Gabb, is limited to one species, but it is very different 

 from Busycon Rlakei, Conrad. Hemifusus Horni, II. Cooperi, and H. 

 Remondi, Gabb, and Fusus mamillatus, Gabb, are members of my 

 proposed genus Ficopsis. Amauropsis alveata, Gabb, is a member of 

 Lamarck's genus AmpuUina. Venericardia Horni, Gabb, is a very 

 different variety from the V. planicosta. Hamites Vancouverensis I 

 believe to be an Ancyloceras. Ptycoceras xquicostatus is more likely 

 to be Hamites. Neptunea curvirostris I believe to represent an unde- 

 scribed genus. 



The controversy which, for a long time, was maintained between 

 Conrad and Gabb as to the age of the Tejon rocks of California, 



