No. 1620. A NEW BRITTLE STAR—ARNOLD. 405 
of the above specific description. The specimens have been compared 
with the recent alcoholics in the collection of the U. S. National 
Museum, but no forms agreeing even remotely with the fossils were 
found. Both A. H. Clarke and the writer are of the opinion that 
the fossils belong to the genus Amphiura, although, as might be 
expected in molds, some of the diagnostic characters are lacking. 
The species is named in honor of the Santa Cruz quadrangle near 
which the types were obtained. 
Type.—Leland Stanford Junior University, Geological collection, 
No. 1078. 
Paratype.—Cat. No. 165481, U.S.N.M. 
Horizon.—Santa Margarita formation, upper Miocene. 
Locality — Santa Cruz County, hills immediately southeast of Scott 
Valley, 6 miles north-northeast of Santa Cruz. (W. J. Miller.) 
Proc. N. M. vol. xxxiv—08——27 
