138 CATALOGUE OP THE BLASTOIDEA. 



Codasteridse. 



Codastcv alternatus 1 , Lyon. 

 *Codaster alteruatus, var. elongatus, JVachsmuth, var. 



Codaster Arnerieanus 2 , Shumard. 

 *Codaster pyraruidatus, Shumard. 



Astrocrinidae. 



*Eleutberocrinus Cassedayi, Shumard § Yandell. 



Genus undetermined : — 



[Pentreruites] striatus, Hall, MS. 



B. Upper Devonian. 

 (i) Hamilton Group. 

 Pentremitidse. 



Pentremitidea Americana, Barris. 

 *Pentremitidea ? leda, Hall, sp. 



Nucleoblastidse. 



Elseacrinus elegans 8 , Hall, sp. 

 *Elseacrinus Canadensis 8 , Montgomery, sp. 



Elseacrinus lucina, Hall, sp. 



Elreacrinus meloniformis, Barris. 

 *Elaeacrinus obovatus, Barris. 



Codasteridae. 



Codaster alternatus, Lyon. 

 *Codaster alternatus, var. elongatus, JVachsmuth, var. 

 *Codaster gracilis, JVachsmuth, sp. 

 *Codaster Hindei 4 , E. $ C. 

 Codaster? subtruncatus, Hall, sp. 



Astrocrinidae. 



*Elcutberocrinus Cassedayi, Shumard fy Yandell. 

 Eleutherocrinus Whitfieldi, Hall. 



Genera undetermined : — 



[Pentremites] calyce, Hall. 

 [Pentremites] lycorias, Hall. 

 [Pentremites] Maia, Hall. 

 [Pentremites] Whitei, Hall. 



1 We have seen no specimens from the Upper Helderberg ; but it seems to be the one mentioned by Lyon. 



2 Possibly only a variety of ft ■pyramadatvs. 



3 Possibly identical with Nueleocrinui Halli, Vanuxem, Ms. 



1 Possibly identical with ft Canadensis, Billings, MS. 



