Hamhach — Revision of the Blastoideae. 41 



7. Cribroblastus melonoides, Meek and Worthen. Bur- 

 lington limestone. 

 Qranatocrinus melonoides, Meek and Worthen. 

 Schizoblastus melonoides, Etheridge and Carpenter. 



*8. Cribroblastus neglectus, Meek and Worthen. Bur- 

 lington limestone. 

 Qranatocrinus neglectus, Meek and Worthen. 

 Schizoblastus neglectus, Etheridge and Carpenter 



*9. Cribroblastus pisum, Meek and Worthen. Burlington 

 limestone. 

 Qranatocrinus pisum, Meek and Worthen. 

 Cryptoblastus pisum, Etheridge and Carpenter. 

 Schizoblastus pisum, Etheridge and Carpenter. 



*10. Cribroblastus potteri, Hambach. Burlington lime- 

 stone. 

 Fentremites potteri, Hambach. 

 Schizoblastus sayi, Etheridge and Carpenter. 



11. Cribroblastus projectus, Meek and Worthen. Bur- 

 lington limestone. 

 Fentremites melo, var. projectus, Meei: and Worthen. 

 Qranatocrinus pro jectus, Meek and Worthen. 

 Cryptoblastus projectus, Bather. 



*12. Cribroblastus roemeri, Shumard. Chemung and 

 Chouteau limestone. 

 Fentremites roemeri^ B. F. Shumard. 

 Qranatocrinus roemeri, Shumard. 

 Orbitremites roemeri, Bather. 

 Schizoblastus roemeri, Keyes. 



*13. Cribroblastus sampsoni, Hambach. Chouteau lime 

 stone. 

 Fentremites sampsoni, Hambach. 

 Schizoblastus sampsoni, Etheridge and Carpenter. 

 Schizoblastus roemeri, Keyes. 



This species is not synonymous with C. roemeri as 

 Keyes takes it. The external ornamentation of the 

 interambulacrum differs very much from that of 

 roemeri (see PL V., Figs. 9 and 10). Moreover the 

 relative width of the interambulacrum is about \ 



