METAMORPHIC SERIES OF SHASTA COUNTY. 595 



The first reference of the Baird shales to any definite horizon 

 was made by Captain A. W. Vogdes, 1 who cites from Baird, 

 Proetus ellipticus, Meek and Worthen, which, in the Mississippi 

 valley, is characteristic of the Waverly. 



Near the U. S. Fisheries at Baird the calcareous and sandy 

 layers are rich in fossils, and in three days of collecting yielded 

 the following fauna : 



Proehis ellipticus, Meek and Worthen. 



Nautilus sp. 



Ort hoc eras sp. 



Bellerophon cyrtolites, Hall. 



Bellerophon conf. galericulatus, Winchell. 



Cyclonema sp. 



Dentalium sp. 



Euoinphalus conf. luxus, White. 



Loxonema conf. delphicola, Hall. 



Loxonema sp. 



Murchisonia sp. 



Pleurotomaria aff. capillaria, Conrad. 



Aviculopecten conf. affinis, Walcott. 



" conf. carboniferus, Stevens. 



" peroccidens, Walcott. 



interli?ieatus, Meek and Worthen. 

 Cre7iipecte7i crenistriattts, Meek. 



" winchelli, Meek. 



Pterinopecten vertunmus, Hall. 

 Streblopteria similis, Walcott. 

 Actinoptera n. sp. aff. A. boydi, Hall. 

 Aviculopinna ? 

 Leptodesma conf. spinigerwn, Conrad. 



" conf. protextum, Conrad. 



Piii7ia ? 



Pterinea pintoensis, Walcott. 

 Macrodon hamiltonce , Hall. 



conf. temiistriatus , Meek and Worthen. 

 Nucula insularis, Walcott. 

 Modiomorpha conf. desiderata, Walcott. 

 Schizodits chemungensis, Hall. 

 Schizodus curtiformis, Walcott. 



'Proc. California Acad. Sci., 1893, Oct. 17, 1892, and Zoe, Vol. III., p. 274. 



