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7- 



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8. 



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12. 



EXPLANATION OF PLATE VII. 



Dicranograptus ramosus, Hall (stem only, older variety). 



„ Nicholsoni, Hopk. 



Dicellograptus caduceus, Lapw. 



„ sextans, Hall. 



„ anceps, Nich. - J% j ~ 



„ Morissi, Hopk. 7;.*vV* * 



„ Forchammeri, Geinitz. 



„ elegans, Cam 



„ Moffatensis, Carr. 



„ „ var. divaricatus^ Hall. 



Ccenograptus gracilis, Hall. 

 ,, surcularis, Hall. 



13. ^pet tenuis, Lapw. 



14. Leptograptus flaccidus, Hall. 



15a. Didymograptus superstes, Hall. 15^, portion of distal extremity. 



16. Thamnograptus typus (?), Hall. ~)<3 



17. Dictyone??ia Moffatensis, Lapw. 



18. Corynoides calycularis, Nich. 



19. „ curtus, Lapw. 



200. Acrothele sp., A. granulata, Linars. 20b c, from original figure (Afdreg. 



ur. Geol., Stockholm, 1877). 

 2 la. Acrotreta Nicholsoni, Dav., Coalpit Bay. 2I£ b, from original figure 



of species (Geo. Mag., 1868, PI. XVI). 



22. Discina Portlockii, Geinitz. Various examples. /Ud^-^^hi 



23. Dawsonia campanulata, Nich. Various examples. — ^*** jl 1 J h^^ 



imen/i - 



Linn, 

 Dumfries. 25<r, from original figure of species (Q.J.G.S., Vol. 



if „ 24a. Peltocaris aptfchoides, Salter (Tieveshilly), slightly contorted specimen. " h 



// Jj^A-^Y- 243, fromSatois original figure (Q.J.G.S., Vol. W Fr, rr-g^ ). /;' _ 



/n jf 25a. Discinocaris Broivniana, H. Wood^Coalpit Bay). 250, Dobbs Linn, 



ies (Q.J.G.S., Vol. 



7T ^f 



