1914] Keiu: Tertiary Echinoicls of the Carrizo Creek Region 47 



Lower Division Upper Division 

 All Carrizo Yuha 



localities Valley Buttes 



Gasteropoda. 



Architeetonica, sp x 



Cancellaria, sp. A x 



Cancellaria, .sp. B x 



Cassis, sp x 



Cerithium, sp x 



Conus, sp. A. x 



Conus, sp. B x 



Dolium, cf. ringens Sowerby x 



Neverita, cf. reeluziana Petit x 



Oliva, cf. porphyria Linnaeus x 



Pleurotoma, n. sp x 



Terebra, sp. A x 



Terebra, sp. B x x 



Turritella, n.sp x 



Echinodermata. 



Encope tenuis, n. sp x 



Cidaris, sp x 



Clyj)easter bowersi Weaver x 



Clypeaster carrizoensis, n. sp x 



Clypeaster deserti, n. sp x 



Hipponoe californica, n. sp x 



Anthozoa. 10 



Diploria bowersi Vaughan (Mss.) x 



Favia merriami Vaughan x 



Plesiastrea californica Vaughan (Mss.) x 



Siderastrea californica Vaughan (Mss.) x 



Stephanocoenia fairbanksi Vaughan x 



Stephanocoenia fairbanksi var. columnaris 



Vaughan x 



Crustacea. 



Balanus, sp x 



Description op Species 



ENCOPE TENUIS, n.sp. 

 Plate 1, figure 1, and Plate 2, figure 1 

 Test broad, transverse diameter sometimes greater than the antero- 

 posterior diameter. Greatest width posterior to the center. Test thin, 

 with sharply angular margin. Summit posterior to apical system and 

 immediately anterior to interambulacral lunule or foramen. Area 



io List of Anthozoa from Vaughan, T. W., Mono. U. S. Geol. Surv., no. 39, 

 1900; Arnold, U. S. Geol. Surv. Professional Paper no. 47, p. 22, 1906. 



