188 University of California Publications in Geology [Vol. 10 



larger than the others ; intercostal grooves narrow. Septa forty-eight, 

 faces granulate, irregularly bent, the upper margins projecting con- 

 siderably above the corallum wall, giving a saw-tooth appearance ; in 

 four complete cycles, of which the first two reach nearly to the colu- 

 mella, fourth cycle short, free. Pali thin and indistinct, attached to 

 the septa, before the margins of the first three cycles, which are of 

 nearly the same diameter. Columella consisting of a few heavy scat- 

 tered twisted trabecular Dimensions of type, which is a small speci- 

 men : maximum transverse diameter, 9.5 mm. ; lesser transverse 

 diameter, 6 mm. ; height, approximately 8 mm. 



Three other fossil corals of this genus have been described from 

 the Pliocene and Pleistocene of the Pacific Coast — Caryophyllia arnoldi 

 Vaughan, Caryophyllia calif or nica Vaughan, Caryophyllia pedroensis 

 Vaughan. The species here described differs from these forms greatly. 



Occurrence. — In a fine soft black shale, on street grade above 

 Smith 's Point, northwestern Oregon ; Astoria Series, Oligocene. 



DENDROPHYLLIA CALIFORNTANA, n. sp. 

 Plate 5, figures 6a, 6b 



Type, no. 11190, Univ. Calif. Coll. Invert. Palae. From locality 1131, one- 

 half mile south -southwest of the town of Walnut Creek, Contra Costa County, 

 California. 



Corallnm consisting of irregularly branching stems. Calices nu- 

 merous but not crowded, subcircular, approximately equal in size, 

 rising only slightly above the surface, of medium depth, occurring 

 apparently on all sides of the stems without definite order of arrange- 

 ment. "Wall rather thin, spongy. Costae granulate, nearly equal in 

 size, well developed, but due to the large number of pores in the wall 

 ribs may not "be continuous but interrupted or deflected. Septa 

 about forty-eight, granulate, rather heavy, arranged in four cycles, 

 of which the first three reach the columella, fourth cycle regularly 

 fused to the third. Columella spongy, occupying a large part of the 

 calice. Dimensions of calices, about 6.5 mm. 



This species has some of the characters of Dendrophyllia hannibali 

 Nomland, which also occurs in the Oligocene of the Pacific Coast. It 

 may, however, readily be distinguished from that form by the more 

 numerous calices, finer costae, and the large spongy columella. From 

 Dendrophyllia tejonensis Nomland of the Tejon Eocene it differs in 

 the spongy wall, greater number of calices, and larger columella. 



