GRAPTOLITES. 13 
GRAPTOLITHUS DIVERGENS. 
Another form, which we know only in small individuals, is illustrated in 
the following figures, which remind one of some forms of the recent genus 
Crista. 
Fig. 12. Fig. 13. Fig. 14. Fig. 15. 
(These figures are enlarged to twice their natural size.) 
Tn another form with similar angular cellules, we have the following illus- 
trations of the mode of occurrence of the species. 
Fig. 16, 
GRAPTOLITHUS GRACILIS. 
