TERTIARY FOSSILS. 83 



PACHYPOMA, Gray. P. BIANGULATA, Gabb. 



P. biangulata, Gabb: Pal. Cal., Vol. 2, p. 15, pi. 3, fig. 26. 

 Miocene, Martinez. 



P. GIBBEROSUM, Chemn., sp. 



Trochus gibberosus, Chemn. ; Conch. Cab., Vol. 10, p. 278, vignette 23. 



T. inequalis, Gmel. ; (not Martyn), p. 3585. 



T. ochraceus, Phil. ; Zeits. f. Mai., 1846, p. 101. 



Pachypoma gibberosum, Cpr. ; Brit. Assn. Rep., 1863, p. 651. 



Post-Pliocene, San Pedro. Living. 



POMAULAX, Gray. P. UNDOSUS, Wood, sp. 



Trochus undosus, Wood ; Suppl., p. 16, pi. 5, fig. 1. 

 T. balcenarum, Val. ; Voy. Venus, pi. 3, fig. 1. 

 Pomaulax undosus, Cpr. ; B. A. Rep., 1863, p. 651. 

 Post-Pliocene, San Pedro and San Diego. Living. 



CALLIOSTOMA, Swains. C. ANNULATUM, Mart., sp. 



Trochus annulatus, Mart. ; Univ. Conch., Vol. 1, fig. 33. 

 Zizyphinus annulatus, A. Ad. ; Zool. Proc., 1851, p. 164. 

 Zizyphinus annulatus, Gray ; Dieffenbach's N. Zealand, p. 237, No. 72. 

 Calliostoma annulatum, Cpr. ; Brit. Assn. Rep., p. 652. 

 Post-Pliocene, San Pedro. Living. 



C. COSTATUM, Mart., sp. 



Trochus costatus, Mart. ; Univ. Conch., pi. 10, fig. 3. 

 Calliostoma costatum, Cpr. ; Brit. Assn. Rep., p. 652. 

 Pliocene, San Fernando; Post-Pliocene, San Pedro. Living. 



C. CANALICULATUM, Mart., Sp. 



Trochus canaliculatus, Mart. ; Univ. Conch., Vol. 1, fig. 32. 

 Zizyphinus canaliculatus, Gray ; Travels in New Zealand, p. 237. 

 Calliostoma canaliculatum, Cpr. ; Brit. Assn. Rep., p. 652. 

 Post-Pliocene, San Pedro. Living. 



