144 CATALOGUE OF THE BLASTOIDEA. 



Troostoblastidse (continued). 



*Triccelocrinus Meekianns, E. §• C. 

 Tricoelocrinus obliquatus, Meek §■ Worthen. 

 *Triccelocrinus obliquatus, Roemer, sp. 

 *Tricoelocrinus Woodmaui, Meek fy Worthen, 



Nucleoblastidse. 



Cryptoblastus ? Kirkwoodensis, Shumard, sp. 



Granatoblastidse. 



Hcteroblastus ? cornutus, Meek and Worthen, sp. 



Genera undetermined : — 



[Pcntatrematites] granulatus, Roemer. 

 [Pentremites] longicostalis, Hall. 

 [Pentreruites] truncatus, Conrad. 



5. Chester Group, including the "Pentrernital " Limestone and the "Upper 

 Archimedes" or "Kaskaskia" Limestone. 



Pentremitidse. 



*Pentrernites angularis, Lyon. 



Pentremites basilaris, Hambach. 



Pentremites Broadheadi, Hambach. 



Pentremites calycinus, Lyon. 



Pentremites cervinus, Hall. 



Pentremites clavatus, Hambach. 



Pentremites Clicsteriensis, Hambach. 

 *Pentremites elcgans, Lyon. 

 ^Pentremites gemmiformis l , Hambach. 

 *Pentrcmites globosus 2 , (Troost) Hall. 

 *Pentremites Godoni, Defrunce, sp. 

 *Pentremites Godoni, var. abbreviatus, Hambach, var. 

 *Pentremites Godoni, var. florealis, Schlotheim, var. 

 *Pentremites Godoni, var. major, E. &$ C, var. 

 *Pentremitcs hemisphericus, Hambach. 



Pentremites Missouriensis, Swallow. 



Pentremites nodosus, Hambach. 

 *Pcntremites obesus, Lyon. 

 ^Pentremites piriformis, Say. 



*Pcntremites pyriformis, var. symnsetricus, Hall, var. 

 *Pentremitcs robustus, Lyon. 

 1 This species appears to us to bo merely a variety of Pentremites clavatus, Hambach. 

 '-' This species was subsequently called P. Troosti by Shumard. 



