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EXPLANATIONS OF PLATE VII. 
GRAPTOLITHUS OCTOBRACHIATUS, page 96. 
A large individual preserving two of the stipes to the length of eight inches, and 
another to nearly the same extent, while the rest are broken off at less 
distances from the disc. The flexibility of their substance is well shown in 
the recurved stipe at the left-hand side of the figures. Although this speci- 
men preserves the most extended stipes of any in the collection, the disc 
is smaller than in several of the other specimens. 
. The exterior ofa large disc of this species, with the stipes broken off a little 
beyond its margin. The two longer portions are so turned as to show the 
cellules. 
. A portion of a large disc, showing the exterior or non-celluliferous face of the 
frond, and preserving portions of four of the stipes. 
. A frond with the stipes broken off at different distances from the centre. The 
substance of the disc or cup is imperfect,—a condition which apparently 
existed while the body was in a living state. 
. An enlargement from one of the stipes of fig. 1, at c, looking upon the apertures 
of the cellules, which are somewhat compressed. 
An enlargement from the same at b, where the substance is laterally compressed. 
An enlargement from the same, where the substance is obliquely compressed at a. 
Figs. 5 and 7 are taken from casts made in the impressions left by removal of the 
substance of the graptolite. 
