1920] Kew: Cretaceous and Cenozoic Echinoidea 121 



Geologic horizon. — Upper Fernando formation, Upper Pliocene 

 and Pleistocene ( ?) ; associated with Strongylocenirotus franciscanus 

 A. Agassiz. 



Localities. — Holotype from Santa Clara Valley, Ventura County, 

 California; also occurs north of San Fernando Valley, Los Angeles 

 County, California and Las Posas Hills, Ventura County, California. 



DENDEASTEE EXCENTEICUS (Eschscholtz) 

 Plate 31, figures la, lb, Ic ; plate 32, figures 1, 2 



? Smtella striatula De Serres. Geognosie terr. du midi de Trance, 1829, 

 p. 156. 



Scutella exeentrica Eschscholtz. Zool. Atlas, 1831, p. 19, pi. 20, figs. 2, 

 2a, 2b. 



Echinaraohniiis excentricus Valenciennes. Voyage Venus, Zooph., 1846, 

 pi. 10. 



Dendraster excentricus L. Agassiz. Cat. raisonne des echinodermes, Soc. 



Nat. Ann., 1847, vol. 7, p. 135. 

 Dendraster excentricus. Gray, Cat. Recent echinoderms, 1855, p. 16. 

 Dendraster excentricus. Stimpson, Boston Soc. Nat. Hist. Jour., 1857, vol. 



6, pp. 526-527. 



Scutella striatula. Conrad, U. S. Pacific railroad explorations , 1857, 



vol. 7, pi. 9, figs, la, 16. 

 Scutella striatula. Meek, Smithson. Misc. Coll., 1864, vol. 7 (183), p. 2. 

 Scutella striatula. Gabb, Geol. Surv. Calif., Pal., 1869, vol. 2, p. 110. 

 Scutella (Echinarachnius) excentricus. A. Agassiz, Eevision of the Echini, 



Mus. Comp. Zool., 111. Cat., 1872, no. 7, pp. 107, 524^526, pi. 13a, figs. 



1-4. 



Echinarachnius excentricus. Cooper, Catalogue of California fossils. Sev- 

 enth Eept. Calif. State Mineralogist, 1888, p. 271. 



Echinarachnius excentricus. Gregory, Geol. Soc. America Bull., 1891, vol. 

 3, p. 107. 



Echinarachnius excentricus. Merriam, Proc. Calif. Acad. Sei., 1899, ser. 3, 



Geol., vol. 1, p. 170, pi. 22, fig. 8. 

 Scutella {Echinarachnius) excentricus. Arnold, Calif. Acad. Sci. Mem., 

 1903, vol. 3, p. 91. 



Not Echinarachnius excentricus Eschscholtz var. Arnold. U. S. Geol. Surv. 



Bull. no. 322, 1907, pi. 24, fig. 8. 

 Echinarachnius excentricus. Pack, Univ. Calif. Publ. Bull. Dept. Geol., 



vol. 5, 1909, pp. 281-282. 

 Dendra.'ster excentricus. Stefanini, Boll. Soc. geol. ital., vol. 30, ,1911, 



p. 707. 



Dendraster excentricus. Clark and Twitchell, U. S. Geol. Surv. Mon., vol. 

 54, 1915, pp. 223-225, pi. 104, figs. la-Id, pi. 105, figs. la-Id. 



Figured specimens. — Nos. 12163, 12164, and 12165, Univ. Calif. 

 Coll. Invert. Pal. 



