PLATE 41. 
Page 
'igs. 1-19. Spirifera disjijncta. 24 % 
(The references to this plate on page 246, should be to plate 42.) 
1-3. Views of small individuals with short or rounded extremities. 
4. An individual with the cardinal extremities much extended. 
5-9. Specimens showing some variations in the extent of the cardinal line, but all possessing 
a simple mesial fold. 
10 -16. Specimens showing variations in the form of the valves having a double mesial fold- 
17. Cast of an individual preserving both valves, with cardinal extremities extended, the 
mesial fold being narrow and angular. 
18. Profile view of specimen, fig. 17, showing the gibbosity of the valves. 
19. An individual with extended cardinal extremities, and a broad rounded mesial fold. 
(The figures on this plate are all dorsal views.) 
