76 



INDEX OF GENERA AND SPECIES. 



O. 



Pa; 



Odontocaulis 42 



granti 42,43 



keeping! 42 



obpy ri formis 43 



occideutalia 42,44 



P. 



PtUograpsns IG 



foliaceus 16 



Ptilograptus 16 



foliaceus 16 



plumosus 16 



R. 



Page. 



lihizoffrapgas 40 



bulbosus 41 



Rhizograptus '. 40 



bulbosus -41 



T. 



Tham-iwf/r(tpi<ui< bartoncnsis 62 



Thamuograptus 62 



bartoncnsis 62,03 



capillaris 62 



(?) mulliformis 64 



typus 62 



