1916] Nomland: Corah from Cretaceous and Tertiary of California 65 



ASTRANGIA INSIGNIFICA, n. sp. 

 Plate 3, figures 14, 15 



Type in University of California Department of Palaeontology collections, 

 from corner Fourth and Broadway streets, Los Angeles, California. 



The material at hand consists of a single corroded specimen of 

 slightly elliptical outline. It appears to have been connected to other 

 corallites by a thin basal expansion. No costae are visible ; this may 

 perhaps be due to the worn condition of the specimen. Calice shallow. 

 Septa in four cycles, thick, granulate, those of the third cycle fused 

 to the second; the septa of the fourth cycle very small. Columella 

 well developed, vesicular. Altitude of corallite, 2 mm. ; maximum 

 latitude, 8.3 mm. 



Occurrence in upper Fernando formation, Pliocene, at corner of 

 Fourth and Broadway streets, Los Angeles, California, in material 

 donated to the University of California by J. Z. Gilbert. 



SIDERASTKEA CLARKI, n. sp. 

 Plate 5, figures 3, 4 



Type from locality 1131, one-half mile SSW of the town of Walnut Creek, 

 Contra Costa County, California. In University of California collections, De- 

 partment of Palaeontology. 



Corallum massive, subrounded. Corallites angular, mostly pentag- 

 onal, separated by a prominent wall which is strengthened inside by 

 numerous adjoining synapticula. Septa about forty-eight, margins 

 apparently dentate, beginning with the third each succeeding cycle is 

 fused to the one that precedes it. Interseptal synapticula present and 

 are especially well developed in a grouping around the inside of the 

 wall, giving this the appearance of being very heavy. A well-developed 

 columella present. Diameter of calices about 7.7 mm. 



Occurrence near base of Agasoma gravidum zone, Oligocene, at 

 locality 1131. 



A large fauna has been collected at the type locality of this species, 

 among others the following characteristic Oligocene forms : Agasoma 

 gravidum (Gabb), Amiantis mathewsonii (Gabb), Ancillaria fish ii 

 Gabb, Dosinia mathewsonii Gabb, Dosinia whitneyi (Gabb), Molopo- 

 phorus gabbi Dall, Molopophorus biplicatus Gabb, Mytilus mathew- 

 sonii Gabb, Priscofusus hecoxi Arnold. 



