Geol.— Vol.. II.] ANDERSON— CRETACEOUS DEPOSITS. 63 



3. Equivalents of the Horsetown. 



There are fewer known deposits of the Horsetown epoch 

 upon the borders of the Pacific, and they have thus far been 

 less studied than either the lower or upper horizons; yet 

 its equivalents are recognized in each of the Pacific border 

 basins, although in the Oregon Basin the typical cephalopod 

 fauna of the Upper Horsetown has not been shown to exist. 

 The close relationship, however, of the Horsetown and at 

 least a portion of the Queen Charlotte Islands section is 

 very much more clearly seen. Several species of the Upper 

 Horsetown fauna occur in a portion of "Division C " of 

 this section, and leave us accordingly but little room to 

 doubt their equivalence. 



Among the connecting elements may be noticed the gen- 

 eral abundance of cephalopods, and especially those of the 

 genera Lytoceras and Desuioceras. Both these deposits have 

 many of the species and general cephalopod fauna of the 

 Ootatoor, as has been more especially emphasized by 

 Kossmat (1895), though previously recognized by others. 

 Among the forms common to the three regions, California, 

 British Columbia, and India, are Lytoceras ttmotheanuvi, 

 L. sacya, Desmoceras betidanti, D. planulattim, Sckhrn- 

 bachia injiata, and others apparently identical. As in the 

 Chico, so here additional species are found still more 

 closely connecting either two of these basins. Lytoceras 

 batesi, Desmoceras breweri, Nautilus sticiaensis, Ancyloceras 

 reniondi, species of Belemnites, and many other molluscan 

 forms are common to both the Sacramento and the Queen 

 Charlotte Islands sections. Schloenbachia propivgua is re- 

 ported from the Queen Charlotte Islands and occurs in the 

 Ootatoor beds. Forms connecting the Ootatoor and the 

 Horsetown are still more numerous. Among them are 

 probably the following: Phylloceras velledce (?=/'. ono'cnse 

 Stanton), Stoliczkaia di'spar, Lytoceras cala, Holcodiscns, 

 aff. H. theobaldiamis StoL, Desmoceras voyt, aff. D. hiti- 

 dorsatiis, and perhaps others. 



Kossmat correlates the Ootatoor horizon and its equiva- 

 lents on the West Coast of America with the Cenomanian, 



