1920] Kew: Cretaceons and Cenozoic Echinoidea 



91 



ASTEODAPSIS BEEWERIANUS (Remond) 

 Plate 13, figures 5a, 5b, 5c 



Echinarachnius breiverianus Remond. Proe. Calif. Acad. Sci., vol. 3, 1863- 

 67, p. 53. 



Echinarachnius hrcwerianus. Meek, Sniithson. Misc. Coll., vol. 7, no. 183, 

 1864, p. 2. 



Echinarachnius hrcwerianus. Gabb, Geol. Surv. Calif., Pal., vol. 2, 1869, 



pp. 36, 109, pi. 12, figs. 65, 65a. 

 Echinarachnius hrcwerianus. Cooper, Cat. Calif. Fossils: Seventh Rept., 



State Mineralogist, 1888, p. 271. 

 Clypeaster ? (Echinarachnius) hrcwerianus. Merriam, Univ. Calif. Publ. 



Bull. Dept. Geol., vol. 2, 1898, pp. 109, 118. 

 Clypeaster hreicerianus. Merriam, Proe. Calif. Acad. Sci., ser. 3, Geol., 



vol. 1, 1899, p. 166, pi. 21, fig. 2. 

 Astrodapsis hrcwerianus. Stefanini, Boll. Soc. geol. ital., vol. 30, 1911, 



p. 702. 



Clypeaster hrcwerianus. Clark and Twitchell, U. S. Geol. Surv. Mon., vol. 



54, 1915, p. 210, pi. 96, figs. 2n-2o, 3. 

 Scuteila breweriana. B. L. Clark, Univ. Calif. Publ. Bull. Dept. Geol., vol. 



8, 1915, pp. 409, 412, 436 (listed). 



Neotype.— iMerrmm) No. 11016 Univ. Calif. Coll. Invert. Pal. 



Test rather small. Measurements of specimen no. 11016 : antero- 

 posterior diameter 27.6 mm., transverse diameter 24.5 mm., greatest 

 height 5 mm. Outline subcircular to suboval, margin thickened, 

 rounded, and somewhat broadly notched in the posterior ambulacra! 

 areas. Apical system central. Abaetinal surface depressed, slightly 

 convex, rising regularly to a low, flattened apex, which is situated on 

 the odd anterior petal near its base. Ambulacral areas wider through- 

 out than the interambulaeral areas. Ambulacra petaloid ; petals broad, 

 flush with the surface of the test, and extending nearly to the margin ; 

 inner rows of rounded pores diverging widely for one-half the distance 

 to the margin, then continuing in nearly parallel lines to the edge of 

 the test ; outer rows of elongate pores diverge to a greater degree at 

 first and then converge until close to the inner rows, where they 

 become rounded, continuing to the ambitus ; pores conjugate. Inter- 

 poriferous areas wide, being from three to four times the width of the 

 poriferous areas. Madreporic area small and pentagonal in shape, 

 with large, round genital pores in each corner except the odd posterior 

 one. Aetinal surface flat near the margin, concave near the peristome. 

 Ambulacral furrows seldom seen, but when present are broad, straight, 

 and extend nearly to the margin. In one specimen faint branching 

 lines were given ofi:' about two-thirds the distance to the edge. Peri- 



