REVISION OF PALEOZOIC STELLEROIDEA. 221 



small spine-bearing plates attached to the adambulacrals, as in the 

 closely related Bundenbachia, On one arm two bundles are seen 

 to proceed from each segment, one oblique, the other vertical to 

 the arm. The oral skeleton consists of stout, bifid pieces, much 

 resembling the oral pairs of adambulacrals of the genotype." 



Formation and locality. — Upper Schenectady formation, the 

 eastern shale phase of the Upper Trenton limestones. From near 

 Schoharie Junction, New York. The holotype is in the New York 

 State collection at Albany. 



TiENIASTER ELEGANS Miller. 



Tseniaster elegans Miller, Jourii. Cincinnati Soc. Nat. Hist., vol. 5, 1882, p. 41, 

 pi. ], figs. 6-6c. — ^J. F. James, Journ. Cincinnati Soc. Nat. Hist., vol. 18, 

 1896, p. 139.— Parks, Trans. Canadian Inst., vol. 8, 1908, pp. 365, 371. 



Frotaster elegans Parks, Trans. Canadian Inst., vol. 8, 1908, p. 368. 



Original description. — "This species is founded upon more than 30 

 specimens occurring on a single slab, but showhig only the ventral 

 side, wath the exception of the ends of some of the rays. 



"The body is deeply stellate, and the rays long, slender, and 

 flexible, and margined on either side with a row of spmes. 



"From the length of some of the rays, a complete specimen, 

 properly spread, would probably have a diameter of an mch and a 

 quarter, or more. The rays taper to a sharp point, are rounded on 

 the dorsal side, and margined on the ventral side by a row of spines, 

 one spine arising from each plate. Only two rows of plates seem to 

 form the dorsal side of a ray. The ventral side of each ray is marked 

 by a furrow in the middle, separating two series of plates or ossicles. 

 These plates are a little longer in the direction of the ray than wide, 

 and alternately break joints at the middle, w^here they are shghtly 

 contracted." 



Formation and locality. — This extraordinary slab is in the Harris 

 collection of the United States National Museum, It was found near 

 WaynesviUe, Ohio, in the Richmond formation of the Ordovicic 

 period. 



Cat. No. 40878, U.S.N.M. 



T.ENIASTER MEAFORDENSIS Foerste. 



Txniaster meafordensis Foerste, Bull. Sci. Lab. Denison Univ., vol. 17, 1914, p. 

 326, pi. 4, figs. 5-7. 



The reference to this species is inserted as this book is gomg through 

 the press. The form appears to be common in the lowest Richmon- 

 dian on Workman Creek, three miles southeast of Meaford, Ontario, 

 Canada. The types are probably in the Victoria Memorial Museum, 

 Ottawa, Canada. 



