574 



NEW YORK STATE MUSEUM 



Incertae sedis : 



Genus strophograptus gen. nov. 

 Strophograptus trichomancs sp. nov. 



Suborder B GRAPTOLOIDEA AXONO- 



PHORA Freeh 



Family diplograpxidae Lapworth 



Genus diplograptus McCoy 

 Diplograptus dentatns Brongniart sp. 

 D. inutilis Hall 

 D. laxus sp. nov. 

 D. longicaudatus sp. nov. 



Genus glossograptus Emmons 

 Glossograptus hystrix sp. nov. 

 G. echinatus sp. nov. 



Genus trigonograptus Nicholson 

 Trigonograptus ensiformis Hall sp. 



Family cLiMAcooRAfTiDAE Freeh 



Genus climacodraptus Hall 

 Climacograptus pungens sp. nov. 



C. ? antennarius Hall 



Genus retiograptus Hall 

 Retiograptus tentHCuiatus Hall 



Appendix, graptolithi incertae sedis 



Genns caryocaris Salter 

 Caryocaris cf. curvilineatus Owrley 



Genus dawsonia Nicholson 

 Dawsonia mouodon Ourley 



D. tridens Gurley 



11 Taxonomic relations of the graptolites 



An exhaustive discussion of the probable taxonomic relations of the 

 graptolites to other classes of organisms does not lie \vithin the scope of 

 a work on the faunas of a limited district. As the question concerning 

 these relations is however a very pertinent one, and has not since Hall's 

 memoir, been touched in the American literature, we notice here briefly the 

 present status of the problem. 



Hall insisted strongly, as Portlock did before him, on the sertularian 

 affinities of the graptolites. Also the succeeding investigators who made a 

 thorough study of the graptolites, notably Carruthers and Nicholson, 

 maintained the hydroid relations in their publications. AUman, who treats 

 the possible affinities of the graptolites most exhaustively in his Monograph 

 of the Gymnohlastic Hydroids^ came to the conclusion that "on the whole 

 it would seem that the graptolites constitute a very aberrant hydrozoal 

 group having manifest affinity with the Hydroidea, to which they are 



^Also printed in Ann. and Mag. Nat. Hist, ser 4. 1872. 9 : 364-80, 



