* 



Hamhach — Revision of the Blastoideae. 41 



7. Cribroblastus MELONOiDES, Meek and Worthen. Bur- 

 lington limestone. 



Oraiiatocrinus melonoides, Meek and Worth ;n. 

 Schizoblastus melonoides, Etheridge and Carpenter, 



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

 lington limestone. 

 Oranatocrinus neglectus, Meek and Worthen. 

 Schizoblastus neglectus, Etheridge and Carpenter 



*9. Cribroblastus pisum, Meek and Wortlien. Burlington 

 limestone. 

 Oranatocrinus pisum, Meek and Worthen. 

 Cryptoblastus pisum, Etheridge and Carpenter. 

 Schizoblastus pisum, Etheridge and Carpenter. 



10. Cribroblastus potteri, Hambach. Burlington lime- 



stone . 

 Pentremites potteri, Hambach. 

 Schizoblastus sayi, Etheridge and Carpenter, 



11. Cribroblastus projectus, Meek and Worthen. Bur- 



lington limestone. 



Pentremites melo, Yir, projectus, Meek and Worthen. 

 Granatocrirms projectus, Meek and Worthen. 

 Cryptoblastus projectus. Bather. 



'12. Cribroblastus roemeri, Shumard. Chemung and 

 Chouteau limestone. 

 Pentremites roemeri, B. F, Shumard. 

 Oranatocrinus roemeri, Shumard. 

 Orbitremites roemeri, B ither. 

 Schizoblastus roemeri, Keyes. 



'13. Cribroblastus sampsoni, Hambach. Chouteau lime 

 stone. 

 Pentremites sampsoni, Hambach. 

 Schizoblastus sampsoni, Etheridj;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 

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

 relative width of the interambulacrum is about \ 



