TAB. VIII. 



Fig. 



1. Corithium tricinctum Q.),pa(/e 69- 



I a. front view of specimeni from 

 Mammaliferous Crag. 



1 h. front view of specimen from 

 Red Crag. 



2. Ccrithium tricinctum (?), ])ack view of 



eroded specimen from Red Crag. 



3. Ceritliium variculosum, jo. 69. 



3 a, magnified portion. 



4. Ceritliium trilineatum, />. 70. 



4 n. apex magnified. 



.5. Ceritliium tuberculare, jy. 70. 



5 a. magnified portion. 



5 h. var. subulatum. 

 .5 c. ,, nanuni. 



6. Ceritliium metaxa {'t),p. 71. 



6 a. magnified jiortion. 



7. Ceritliium cribrarium, /;. 71. 



7 a. back view. 



7 d. front view, anotlier specimen. 



7 n u. magnified portion. 



8. Ceritliium adversum, 7;. 72. 



8 a. magnified portion. 



9. Ceritliium granosum,/j. 73. 



10. Ceritliium perpulclirum, /». 72. 

 10 a. magnified portion. 



Fig. 



11. Scalaria Groenlandica, jy. 90. 



1 1 a. back view, var. a. 

 1 1 h. front view, var. /3. 



12. Scalaria finibriosa,7>. 91. 



13. Scalaria hamulifera, ><. 91. 



14. Scalaria varicosa,^^ 90. 



15. Scalaria frondosa, /./. 92. 



16. Scalaria frondicula, p. 92. 



17. Scalaria foliacea, /;. 93. 



18. Scalaria subulata, 7;. 93. 



19. Scalaria clathratula, /;. 94. 



1 9 a. front view. 

 19 i5. back view. 



a a. magnified portion. 



20. Scalaria Trevellyana,jy. 94. 



21. Scalaria obtusicostata,/. 95. 



22. Scalaria cancellata, jy. 95. 



22 a. magnified portion. 



23. Fossarus sulcatus, jo. 120. 



23 a. front view, var. a. 

 23 h. back view. 



23 a a. magnified portion. 



23 c. back view, var. lineolatus. 



23 d. front view. 



The lines indicate the size of the specimens. 



