1920] 



Kew: Cretaceous mid Cenozoic Echinoidea 



143 



CATOPYGUS (?) CAJONENSIS Kew, n. sp. 

 Plate 40, figures la, 16, Ic 



Holotijpe.—No. 11344 Univ. Calif. Coll. Invert. Pal. 



Test large. Measurements of holotype : anteroposterior diameter 

 32 mm., transverse diameter 31 mm., greatest thickness 26 mm. Out- 

 line subcordate ; broadest anterior to the center of the test. Upper 

 surface regularly rounded to a central apex. Apical system ante- 

 riorly eccentric ; four large genital pores present. Ambulacra sub- 

 petaloid ; the double rows of pores extend in straight, slightly divergent 

 lines to the ambitus ; interporiferous areas slightly broader than one 

 of the poriferous areas. Lower surface convex ; peristome somewhat 

 sunken ; indistinct episternum jiresent. Periproct round and situated 

 well above the ambitus. 



Related forms. — This form differs from Catopijgus { ?) calif ornicus 

 Kew in having a larger test, an eccentric apical system, and in lacking 

 the posterior truncation of the test. 



Geologic horizon. — Martinez group. Lower Eocene. 



Locality. — Big Rock Creek, Los Angeles County, California, Univ. 

 Calif, loc. 2249 (Dickerson). 



Tribe SPATANGOIDEA Duncan 

 Family SPATANGIDAE Wright 

 Genus EPIASTER d'Orbigny 



EPIASTEE DEPRESSUS Kew, n. sp. 

 Plate 40, figures 3o, 3b, 3c, ?,d 



Cotijpes.—N OS. 11011 and 11339 Univ. Calif. Coll. Invert. Pal. 



Test of medium size. Measurements of specimens 11011 and 11339, 

 respectively: anteroposterior diameter 23 mm. and 31.3 mm., trans- 

 verse diameter 22.5 mm. and approximately 26 mm., greatest height 

 10.2 mm. and 15.0 mm. Outline from above subeircular to cordiform; 

 posterior extremity somewhat truncated. Upper surface regularly 

 rounded and with a forward slope in the anterior portion of the test ; 

 sides rounded. Summit situated far back on the ridge, which extends 

 from the apical system to the periproct. Apical system posteriorly 

 eccentric. Petals symmetrical ; bivium very short, being one-half the 

 length of the anterolateral pair; petals of trivium of the same length. 



