760 NEW YORK STATE MUSEUM 



PLATE 7 



Genus goniograptus McCoy 



See pi. 



Goniograptus perflexilis sp. no v. 



Page G25 

 See pi. 6 



1 Young rhabdosome showing branches of first and second order, x2 



2 Young rhabdosome with branches of the third order 



3 Young rhabdosome with branches developed to the fourth order. x2 



4 Idem in natural size 



6 Mature rhabdosome in the usual confused state of preservation 



7 About half of mature rhabdosome ^vith the branches less confused 



8 Restoration of a mature rhabdosome in spreading condition 



9 Mature rhabdosome laterally compressed, retaining a proximal, apparently 



baglike appendage 

 Grraptolite bed 2 of the Deep kill section 



Goniograptus geometricus sp. nov. 



Page 627 



5 Half of young I'habdosome 



10 Young rhabdosome 



11 Young rhabdosome with branches of the third order 



12 Young rhabdosome in a similar stage of development. x2 



13 Half of a young rhabdosome showing the points of origin of the denti- 



culate branches. x2 



14 Similar fragment with longer denticulate branches. x2 



15 A principal stem and branches of a mature rhabdosome 



16 Half grown rhabdosome showing the four principal stems 



17 Two main stems with the lateral branches, the latter showing the angles 



of divergence in undistorted condition 



