268 ROBERT TRACY JACKSON ON ECHINI. 



For locality Newberry says, "Same as the last," which reads, Crinoidal Limestone [Coal 

 Measures] near junction of the two Colorados, and in same rock, 60 miles west of that point, 

 near the Great Canon of the Colorado. The specimen figured (Plate 13, fig. 8), which is undoubt- 

 edly the original of Newberry's Plate 1, fig. 4, bears the locality label "Canon Diamond River." 

 It is in Columbia University Collection from the Newberry Collection. 



*Archaeocidaris aculeata Shumard and Swallow. 

 Plate 13, figs. 9a-9f. 



Archacocidaris verneuiliana Swallow and Hawn, 1858, p. 180 (non King, 1850, description of Plate 6, figs. 



22-24, for which see this memoir, p. 245). 

 Archacocidaris aculeatus Shumard and Swallow, 1858, p. 223; Klem, 1904, p. 45; Lambert and Thiery, 



1910, p. 124. 

 Archaeocidaris aculeata Miller, 1889, p. 225; Keyes, 1894, p. 130, Plate 15, fig. 3; 1895, p. 188, Plate 18, 



fig. 3. 



Known only from dissociated spines and plates. Interambulacral plates are rather high 

 hexagons, basal terrace marked, secondary tubercles in a narrow border on the margin of the 

 plates. Primary spines are stout, inflated in lower third, circular in section or multiangular, 

 with numerous fine short spinules directed distally. Primary spine 1 to 2 inches in length. 

 The only published figure of the species is that by Keyes, but specimens kindly sent me by Dr. 

 Beede are apparently this species and are so figured. 



Upper Coal Measures, Valley of Verdigris River, on Santa Fe Road, near Rock Creek, 

 and 25 miles west of Council Grove in valley of Cottonwood Creek; New Point, Jackson 

 County, Missouri; Fort Belknap, Texas (Klem); Topeka, Kansas, Indiana University Collec- 

 tion. Miller (1889) and Miss Klem (1904) ascribe this species to the Permian in part. 



*Archaeocidaris shumardana Hall. 

 Plate 13, figs. lOa-lOc. 



Archaeotidaris shumardana Hall, 1858, p. 699, Plate 26, figs. 3a-3d; Keyes, 1894, p. 128. 



Archaeocidaris cf. shumardana Walcott, 1884, p. 313. 



Archacocidaris shumardiana Keyes, 1895, p. 186. 



Archaeocidaris shumardina Keyes, 1895, p. 186. 



Archacocidaris shumardanus Klem, 1904, p. 56. 



Archaeocidaris shumardi Lambert and Thiery, 1910, p. 124. 



Known only from plates and spines. Interambulacral plates are hexagonal, wider than 

 high, basal terrace pronounced, secondary tubercles in a narrow row around the margins of 

 the plates. Primary spines small, short, swollen in the lower third, smooth or finely striate 

 proximally, above which muricate with elongate ascending spinules. 



