EXPLANATIONS OF PLATE II. 
GRAPTOLITHUS SIMILIS, page 78. 
Fig. 1. A very young individual of this species. 
“9. An individual somewhat more mature. 
“ 3. An enlargement showing the form of the radicle, and the cells near their 
origin, with a non-celluliferous space between. 
“ 4, A fragment of a longer stipe, which is imperfect at both extremities. 
“ 5, An enlargement of fig. 4. 
GEAPTOLITHUS ARCUATUS, page 179. 
Fig. 6. A stipe of a small individual, more than usually curved. 
“ 7, A stipe having a process just above and opposite the radicle. 
“ g. A larger stipe, the cellules very clearly preserved. 
“ 9, A specimen showing the stipes on both sides of the radicle, and preserving 
their peculiar curvature very perfectly. 
‘10. An enlargement of a portion from figure 8. 
GRAPTOLITHUS EXTENSUS, page 80. 
Fig. 11. A single stipe more than four inches long, with the radicle and base of the 
opposite stipe. 
“ 12. A fragment showing a part of the stipe on each side of the radicle, natural size. 
“ 13. The radicle and adjacent cellules, enlarged from fig. 12. 
“ 14, An enlargement of fig. 12 at a point about two inches from the radicle. 
15. A fragment of a stipe where the cellules are distended by iron pyrites. 
16. An enlargement from fig. 15. 
GRAPTOLITHUS FLACCIDUS, page 143. 
Fig. 17. A portion of a large fragment of slate, with parts of several individuals upon 
the surface; and showing the origin of eight individuals in the minute 
radicles. Some of these are indicated by asterisks on the engraving. 
‘© 18, An enlargement to three diameters of the radicle and stipe-bases, with the 
cellules. From the point a on fig. 17. 
‘ 19, A farther enlargement of a portion to show the form of the collabess and the 
pustuliform appearances at the base of the divisions between them. 
