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University of California Puhlications in Geology [Vol. 12 



the test, and surrounded by an area which is considerably swollen. 

 Large primary scrobiciilar tubercles are present in the inter-radial 

 area, limited by the length of the petals; the remainder of the tuber- 

 culation could not be made out. Subanal fasciole present, but no 

 peripetalous fasciole could be distinguished. 



Geologic, horizon. — Tejon group, Upper Eocene; (?) Meganos 

 group. Middle Eocene. 



Localities. — Cotypes and topotype from Santa Fe Railroad cut, 

 west of Vine Hill Station, Concord quadrangle. Contra Costa County, 

 California; a specimen, probably Spatangus pachecoensis Pack, occurs - 

 in Meganos formation near head of Aliso Canyon ("West) in Santa 

 Susana quadrangle, Los Angeles County, California (loc. 549 Calif. 

 Acad. Sci. Coll.). 



Transmitted May, 1917. 



