— 38 — 



as from "Cret. A" beds, while in fact all but the two named above, 

 and " Gryphoea vesicularis Lamk," were from the one bed mentioned, 

 and therefore of " Cret. B." Ten of these species are not contained in 

 Mr. Fairbanks' collection, although large, and from very near to the 

 same localities, showing what a great variety may be found in a very 

 limited range. On a second visit to the region in 1872 I collected 

 another series only three miles northward, where Rose Canon enters 

 Soledad Canon, and all I could identify of them were included in the 

 localities given with the Catalogue of Californian Fossils, published in 

 the Report of the State Mineralogist for 1887. Nine of these were also 

 absent from Mr. Fairbanks' series from six localities. In order to 

 exhibit the subject in full I have added these 19 species to the table, in 

 columns headed "Cooper's Collection," and "Near Soledad." His addi- 

 tions to the true Cretaceous fossils were the most important, being 44 

 from the west base of Point Loma and from La Jolla, besides 10 sup- 

 posed to be new species. To the 37 before known from Div. B he added 

 15, and 6 new ones. The proportions are now 51 in Div. A and 57 in 

 Div. B, a very close balance for comparison of the two, but it does not 

 exactly express their numbers, as several (about 10) are found in both, 

 and this table only shows how they appear successively in ascending 

 from the lowest bed at Point Loma to the highest northward. In other 

 parts of the State many of the same species have been found in different 

 beds, as referred to in the Catalogue of Californian Fossils mentioned 

 above. These references are included in the first two columns of the 

 table. 



In the Catalogue I also mentioned three Cretaceous species which I 

 found near San Luis Rey, and these were the first found so far north 

 of San Diego Bay (belonging to Div. B); but they were so imperfect as 

 to cause doubts of their true age until confirmed by the finding of 6 

 more species there by Mr. Fairbanks. From there the Cretaceous 

 strata strike due north through the Santa Ana Mountains, being 

 concealed along the coast by Tertiary beds, except at one spot on the 

 west slope of the mountains, where Alisos Creek cuts through the 

 Tertiary, eight or ten miles from the beach in Orange County. Dr. 

 Bowers found fossils of both Div. A and B in the Santa Ana range, 

 but could not perceive any line of demarkation or unconformability 

 between them. 



Though he met with four or five new Cretaceous species, the speci- 

 mens are generally too imperfect for description or illustration, only 

 two being here described. 



