Tigs. 7-15. Sketches o/Graptolites from the SMddaw Slates. (Natural size.) 



7. Phyttograptus, Hall. 8. Teiragropsus, gen. nov. (a. is the typical form ; b. may possibly 

 be a form of Dichograpsus). 0. Vichograpims arauea, Salter. 10. Dwhograpsus, Salter, 

 with its corneous cup (froui Lopan). 11. Dichograpsu* Sedgtrickii, Salter. 12. Branchlet 

 of Diclwgmpims. 13. Several forms of Didymograpsut. 14. Branching Bryozooti? 15. 

 Caryocaris TT'rightii, Salter. 



