556 M.NN iUlCK £>TA'1'B MUSEUM 



5 Brvograptus sp. nov. ccc 



6 B. kjerulfi Lapxcorth rr 



7 Loganograptus logaui Hall ccc 



8 Dichograptus octohrachiatus Hall ccc 



9 Gouiograptus thiireaui McCoy cc 



10 Goniograptus sp. nov. r 



11 Teninograptus cf. multiplex Nicholson c 



12 Tetragraptus fruticosus Hall cc 



13 T. fruticosus var. nov. c 



14 T. serra Brong cc 



15 T. bigsbyi Hall cc 



16 T. quadribrachiatus Hall cc 



17 T. aff. hicksii Hoplc. r 



18 T. sp. nov. r 



19 T. sp. nov. r 



20 Phvllograptus ilicifolius Hall cc 



21 P. angustifolius Hall r 



22 Didymograptus nitidus Hall c 



23 I), patulus Hall cc 



24 D. extensus Hall cc 



25 D. filiformis Tullherg r 



26 D. (Leptograptus) sp. nov. c 



27 Dawsonia tridens Gurley c 



28 D. monodon Chirley c 



29 Caryocaris curvilatus Gurley cc 



30 Cf. C. oblongus Chii'ley r 



31 Small indet. brachiopods cc 



A comparison of the fauna of graptolite beds 1 and 2 proves 

 that both belong to the same zone. This zone is characterized 

 by the prevalence of species and individuals of the genera 

 Dichograptus, Tetragraptus, Didymograptus and Phyllograptus. 

 Of these the genus Tetragraptus appears with the greatest 

 number of species, and it clearly reaches the acme of its develop- 

 ment here. While T. quadribrachiatus and the new 

 species have not been observed to pass into the higher zones, 



