INCERTAE SEDIS. 449 



Archaeocidaris sp. Julien. 

 Arrhacoridaris sp. Julien, 1896, p. 12(), Plate l(i, figs. 14, 17; Plate 17, figs. 8, 10; Klem, 1904, p. 66. 



Spines with four ranges of spinules, perhaps referable to A. rankini Young (p. 276). 

 Lower Carboniferous, I'Ardoisiere, France. 



Archaeocidaris sp. Julien. 

 Archaeocidaris sp. Julien, 1896, p. 126, Plate Ki, figs. 13, 15, 16; Plate 17, fig. 9; Klem, 1904, p. 66. 



Spines with six ranges of spinules. These spines measure up to 54 mm. in length. 

 Lower Carboniferous, I'Ardoisiere, France. 



Archaeocidaris (?) sp. Julien. 

 Archaeocidaris sp. Julien, 1896, p. 127, Plate 8, fig. 1; Klem, 1904, p. 65. 

 Lower Carboniferous, Regny; and in the quarries of Saint Germain-Laval, France. 



Cidarites tennesseae Troost. 



Cidarites tennesseae Troost, 1850, p. 59; Troost (in Miss Elvira Wood's paper, 1909), p. lOS, Plate 8, 



figs. 2-5. 

 Archaeocidaris tennesseae Loven, 1874, p. 44; Klem, 1904, p. 64; Lambert and Thiery, 1910, p. 125. 



Of this species no description is given by Troost, and it is known only from the figures 

 given in Miss Wood's publication of Troost 's Crinoids of Tennessee. The spines are smooth 

 and a hexagonal interambulacral plate is apparently referable to the species. 



No locality nor geological formation are given. 



Echinocrinus anceps T. and T. Austin. 



Echinocriniis anceps (nomen nudum) T. and T. Austin, 1842, p. HI; T. and T. .\ustin, 184.3, p. 207; 



Bather, 1907, p. 452. 

 Archaeocidaris anceps Etheridge, 1888, p. 221. 



The description of this species is unrecognizable. 



The locality and horizon of this species are not given. 



The Austins (1843) compare Echinocrinus anceps with E. pomum. T. Austin later (ISGO) 

 gave the name Protechinus anceps to a distinct species. As both are very little known, there is 

 a possibility of confusing these names (p. 454). 



Echinocrinus spinosus T. aufl T. .\ustin. 



Eckinocrinus spinosus (nomen nudum) T. and T. Austin, 1842, p. Ill; T. and T. Austin, 1843, p. 207; 



Bather, 1907, p. 452. 

 Archaeocidaris spinosus Etheridge, 1888, p. 221. 



The description of this species is unrecognizable. 



The locality and horizon of this species are not given. 



