GRAPTOLITES. 11 
Fig. 8. 
GRAPTOLITHUS FLEXILIS: 
with a portion enlarged. 
conjoined into one strong stem, with the bifurcating branchlets spreading 
above, and this stem probably fixed in the soil. We then have a represen- 
tation of the typical forms of this genus, as in the accompanying figure, 
and as illustrated on plate xvii, figs. 8 and 9, of this memoir. 
Fig. 9. 
DENDROGRAPTUS HALLIANUS. 
In this species, as shown in the enlargements of the branchlets, we have 
