150 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE X. 



Suture lines of new species. 



Page. 



Desmoceras lecontei. 95 



Hamiles cUipticus. ^7 



Desmoceras dilleri. 97 



Desmoceras subquadratum. 96 



Bacidites fairbanksi. 92 



Pachydiscus sacramcnticus. 105 



Desmoceras ashlatidiciim. 100 



Holcodiscus, cf. H. theobaldia^ius. loi 



Sonneratia stantoni. 105 



SchliUeria diablocnsis. 80 



Desmoceras colusacnse. 96 



Hcteroceras ceratopse. 9' 



Prionotropis bramieri. 125 



Desmoceras hoffmanni. 94 



