Hambach — Revision of the Blastoideae. 41 



7. Cribroblastus MELONOiDES, Meek and Worthen. Bur- 

 lington limestone. 

 Qranatocrinus melonoides , Meek and Worthen. 

 SchizoblasUis melonoides, Etheridtje 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. 



Granatocrinus pisum, Meek and Worthen. 

 Cryptoblastus pisum, Etheridge and Carpenter. 

 Schizoblastxis pisum, Etheridge and Carpenter. 



*10. Cribroblastus potteri, Hambach. Burhngton lime- 

 stone . 



Pentremites potteri, Hambach. 



Schizoblastus sayi, Etheridge and Carpenter, 



11. Cribroblastus projectus, Meek and Worthen. Bur- 

 lington limestone. 



Pentremites melo, var. projectus. Meek and Worthen. 

 Qranatocrinus projectus, Meek and Worthen. 

 Cryptoblastus projectus, Bather. 



*12. Cribroblastus roemeri, Shumard. Chemung and 

 Chouteau limestone. 

 Pentremites roemeri, B. F. Shumard. 

 Granatocrinus roemeri, Shumard. 

 Orbitremites roemeri, Bather. 

 Schizoblastus roemeri, Keyes. 



*13. Cribroblastus sampsoni, Hambach. Chouteau lime 

 stone. 

 Pentremites sampsoni, Hambach. 

 Schizoblastus sampsoni, Etherid2;e 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 

 7'oemeri (see PI. V., Figs. 9 and 10). Moreover the 

 relative width of the interambulacrum is about 4- 



