. PLATE IV— Continued. 



Gallograptus elegans, Hall. 



Pig. 15. An enlargement of the non-celluliferous side of a bifurcating branchlet, showing the 

 striated surface and a semi-articulate structure. 



Pttlograptus plumosus, Hall. 

 Fig. 16. A fragment which is three times branched. 



Pttlograptus geinitzianus. Hall. 



Fig. 17. A fragment which is irregularly branched, showing the non-celluliferous side. 

 " 18. An enlargementj showing the cell-apertures. 



PLATES V, VI, VII AND VIIL 



These plates, intended to Ulustrate articles V and IX of Contributions to Paleontology, 

 are, together with the papers, omitted from this Report, and will be published in a succeeding 

 one. 



