PLATE V. 



Pentremitidea Eifelensis, Roemer, sp., p, 17k 



... . . '''' "' 



Fig. 1. Radial Yiew of a specimen with the base broken. Middle Devonian, Eifel. x .'5 II 



Pig. 2. Summit new of the same. x3 10 1. 



Pentremitidea clayata, var. Schultzei, E. §■ C, var., p. 177. 



Pig. 3. Radial view of a partially broken example. Beneath the ambulacrum arc visible 

 the lancet-plate and the exposed tops of the hydrospires. Lower Devonian, 

 Leon. x 1 \ 93 



Fig. 4. Summit view of the same specimen. x \k ... 50 



Fig. 5. Another radial view of the same, with the ambulacrum broken short off, and most 



of the radial plate removed so as to expose the hydrospires. x 2 . . . . 178 



Pentremitidea Wachsmuthi, E. &; C, p. 178. 

 Fig. 6. Interradial view, showing the flattened summit and the basal cup, which is slightly 



broken below. Lower Devonian, Leon. x 1| 24 



Fig. 7. Summit view of the same specimen, with the very small deltoid plates just visible. 



xl| 37 



Fig. 8. Basal view of the same, showing the triangular outline of the lower part of the 



basal cup. xli 20 



Pentremitidea Gilbertsoni, E. &; C, p. 179. 

 Fig. 9. Interradial view of a weathered specimen. Lower Devonian, Leon. Coll. P. H. 



Carpenter. x H 24 



Fig. 10. Summit view of the same specimen, x lj 104 



Pig. 11. Basal view of the same. x 1J 10 



Pentremitidea leda, Hal/?, sp. 



Pig. 12. Radial view, showing the unusually large deltoid plates and the long ambulacra. 



Upper Devonian, Ontario. Coll. G. J. Hinde. x 2 12 



Fig- 13. Summit view of the same specimen. x2 104 



Fig. 14. Basal view of the same. x2 17 



Pentremitidea Roemeri, E. £$ C. 

 Fig. 15. Summit view, showing the broad ambulacra, almost subpctaloid in form, and the 



large spiracles. Middle Devonian, Eifel. Coll. F. Roemer. x 4 . . . . 104 



Pentremitidea similis, E. § C, p. 180. 



Fig. 16. Summit view, with the deltoid plates just visible externally. Middle Devonian, 



Eifel. x3 101 



Pentremitidea clavata, Schultze, var., p. 176. 

 Fig. 17. Radial view of a variety of this species, with the ambulacra longer and straightcr 



than usual. Lower Devonian, Leon. Coll. P. H. Carpenter. x2 . . . 11 



