474 H. W. Fairbanks — Validity of the so-called Wallala 



Turritella, /Solarium, and one subsequently determined as 

 Coralliochama orcutti. The Coralliochama is the type of a 

 new genus and is the most characteristic fossil in the Wallala 

 beds as well as in those on Todos Santos Bay. 



About the same time C. A. Orcutt of San Diego sent to the 

 National Museum a collection of fossils from the shore of 

 Todos Santos Bay, Lower California. These were in a good 

 state of preservation and included the following species : 

 Coralliochama orcutti, JYerita, Cerithium pillingi, C. totium- 

 sanctorum, and Trochus euryostomus. The Coralliochama is 

 thus seen to be the only species common to both localities, the 

 other species being new. 



Although the two occurrences are so widely separated, Dr. 

 White found a general resemblance of the faunas, and as they 

 were different from any known Cretaceous in the 'United 

 States and resembled the Gosau of Europe, he termed the 

 whole the Wallala beds. Wallala being a town near the occur- 

 rence in northern California. The latter beds I have not seen, 

 but the past year an opportunity was given me to examine 

 those on Todos Santos Bay. The strata, consisting of shales, 

 sandstones, and conglomerates resembling the Chico, are ex- 

 posed in cliffs along the southern shore of the bay for about 

 three miles. They form a narrow strip along the north flank 

 of Punta Banda, a long high ridge of porphyry and diorite 

 bounding the bay on the south. The strata dip to the north- 

 east at an angle of 30-60 degrees and are somewhat faulted 

 but are entirely unaltered. Fossils are not abundant through 

 the formation but a considerable variety was collected during 

 my hasty visit. The Coralliochama is exceedingly abundant 

 in strata scattered through a vertical distance of several hun- 

 dred feet. One bed four feet thick was formed almost wholly 

 of a mass of shells. The following is a list of the fossils 

 found here. 



Coralliochama orcutti. Tellina aequalis. 

 Axinsea veatchi. Lunatia avellana. 

 Ostrea Volutilithes 



Pugnellus Actreonina pupoides. 



Astartate mathewsoni. Cinulia obliqua. 



Venus varians. Nucula truncata. 



Fusus Baculites chicoensis. 



Leda translucida. Gyrodes expansa. 



Turritella chicoensis. Ancyloceras lineatus. 



Tellina ooides. Leda gabbi. 

 Mactra ashburneri. 



It will be seen that not only is this list much larger than 

 that found by Mr. Orcutt but with the exception of the Coral- 



