Eambach — Revision of the Blastoideae. 47 



when compared with Pentremiles* All known species belong 

 to the lower Subcarboniferous. This genus will include the 

 following species : — 



1. CoDONiTES coNicus, C. Wachsmuth and F. Springer. 



Kinderhook gr. 

 Orophocrinus conicus, Wachsmuth and Springer. 



2. CoDONiTES CAMPANULATUS, Hambach. Lower Burling- 



ton limestone. 

 Orophocrinus campanulatus, Keyes. 

 Orophocrinus stelliformis, Etheridge and Carpenter. 



3. CoDONiTES FUSiFORMis, Wachsmuth and Springer. 



Kinderhook gr. 

 Orophocrinus fusiformist Wachsmuth and Springer. 



4. CoDONiTES GRACILIS, Mcck and Worthen. Lower Bur- 



lington limestone. 

 Orophocrinus gracilis, Meek and Worthen. 



5. CoDONiTES STELLiFORMis, Owcn and Shumard. Lower 



Burlington limestone. 

 Pentremites stelliformis, Owen and Shumard. 

 Orophocrinus stelliformis, Meek and Worthen. 



6. CoDONiTES WHiTEi, Hall. Burliugtou limestone. 



Codastus lohitei, Hal!. 

 Orophocrinus whitei, Whitfield. 



2. Family Codasteridae. 

 1. Genus Codaster. 



General form of the body bell-shaped or obconical. Am- 

 bulacral side more or less horizontal. Ambulacra linear. 

 Mouth small and central. Anus large and lateral, placed be- 

 tween two ambulacra. Numerous slits at each side of the 

 ambulacrum, except on the posterior side, ^. e., on the side 

 which faces the anal opening, where they are wanting. Inter- 



♦ It is more closely ralated to Pentremites than to Codaster on account 

 of the hydrospiree. 



