-±20 Diller and Schuchert — Devonian Mocks in California. 



Notes on the fossils. 



Favosites canadensis, Cladopora labiosa, C. acupicta, and 

 Syringopora maclurii, are characteristic forms of the great 

 coral reef of the Corniferous limestone, as developed in eastern 

 North America. The material from the Shasta county locali- 

 ties agrees closely with the descriptions of these species, and 

 the identifications, therefore, are regarded as fairly accurate. 

 Associated with these fossils are a number of other corals, 

 which could not be identified specifically, however, since some 

 are new and of others the material is not well preserved. 

 These corals are given in the first five columns of the annexed 

 list. 



The Alveolites provisionally referred to A. minimus Davis, 

 is represented in Nevada by A. multilamella Meek.* The 

 corallites in the California specimens are quite tortuous, and 

 have thinner walls, thus differing distinctly from Meek's 

 species. Externally the present specimens agree with the 

 figures of A. minimus, but, no positive identification can be 

 made as Davisf gives no description of any of his species and 

 usually no figures, of their internal structure. 



Acermdaria pentagona Goldfuss, sp., as identified by Meek,;}; 

 occurs at u Treasure Hill, Nevada, in silver bearing Devonian 

 Beds." The California specimens are found in masses six 

 inches in diameter, and appear to have a somewhat larger num- 

 ber of septa than the Nevada form. These differences, how- 

 ever, are not sufficient for specific separation. All the other 

 known species of American Acei'vidaria have larger corallites 

 than A. jpentagona. 



The California examples of Diphyphyllum fasciculum 

 Meek,§ agree fairly with the Nevada specimens from " Argyle 

 and Treasure Hills, White Pine Mining District." A closely 

 related form, with fewer and not so closely approximating 

 corallites, also occurs at localities 2 and 3. Meek has united 

 these in his 1) . fasciculum. 



The Endophyllum occurring near Gazelle is interesting 

 since it is the first known occurrence of this genus in America. 

 It differs chiefly from E. boweroanki and E. abditum Edwards 

 and Haime,|j of the Devonian of Devonshire, in having much 

 smaller corallites. 



A form of Gypidida from the same locality may prove to 

 be the same as Pentamerus comis or P. lotis Walcott,^[ occur - 



*Op. cit., p. 25, PI. II, figs. 7-Tb. 



f Kentucky Fossil Corals: Kentucky Geol. Survey Reports, 1885. 



% Geol. Espl. 40th Paral.,'vol. iv, 1877, p. 31. PL II, figs. 5, 5a. 



§ Op. cit., p. 29, PI. II, figs. 4-4b. 



I Mono. British Fossil Corals. Pt. IV, p. 233, 1853. 



IfMono. viii, IT. S. Geol. Survey, pp. 159-161, 1884. 



