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

 Observations, etc. {Continued.) 



Californica." Volutilithes Navarroensu belongs to "my genus Ros- 

 tcUitffi." Fusus Remondi is a species of Perissolax allied to P. 

 penita. Anfauropsis alveata is a species of Glohularia. Fisctis ma- 

 millatus is probably ^ycoiypus modcstus, Conrad. Perissolax is a 

 genus nearly related to Sycoti/pus. Chcmnitzia Spillmani is very 

 distinct from any species 1 described under that name. Aiuria 

 Mathcivsoni is Aturia .:ic-zac. hosinUi cicnttd is no.siiicopsis alta. 

 D. Vvasana is Diouv orafa. lioixors. Mcckia .sella is ])robably 

 Cyprina bisccta. M. iiaris is a sjx'cies of Yoldia. Mactra Ash- 

 burneri is probably J7. (illxirin. Conrad. Xucula truncata — two 

 species are evidently confounded under this name. Lcda protexta? 

 — there are two species here united, neither of which is the pro- 

 texta — one Eocene, the other Cretaceous. 



A reply to these criticisms of ]Mr. Conrad is given by Mr. AV. M. 

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



Reply to ]\Ir. 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 Palaeontology of Califor- 

 nia ; by T. A. Conrad. Am. Jour. Conch., vol. 2, 1866, pp. 

 97-100. 



The author remarks that Volutilithes IVavarroeusis has the ex- 

 ternal 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 Busy con Blakci, Conrad. Hemifusus Horiii, H. 

 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 Ampullina. Venericardia Horni, 

 Gabb, is a very different variety from the F. planicosta. Hamites 

 Vancouverensis I believe to be an Ancyloceras. Ptyeoceras aequicos- 

 tatus is more likely to be Hamites. Neptunea curvirostris I believe 

 to represent an unaescribed genus. 



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

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

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

 uppermost member of the Cretaceous (Division B of the California 

 Reports), can be found in the following papers: 



Conrad. Am. Jour, of Conchology, vol. 1 (1805), pp. 302-5; vol. 

 2 (18G6), pp. 97-100; Am. Jour. Sci., vol. 44 (1807), pp. 370-7. 



Gabb. Am. Jour, of Conchology, vol. 2 (1800), pp. 87-02: Am. 

 Jour. Sci., vol. 44 (1807), pp. 200-9; Proc. Cal. Acad. Nat. Sci.Mices, 

 vol. 3 (1807), pp. 301-300. 



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

 Acad. Nat. Sci., Phila., 1882, p. 190), remarks, in a footnote, "that 

 Conrad finally yielded his position, but he has been unable to dis- 

 cover the evidence of such a change of opinion in any of that 

 author's writings." 



