Plate 3 



Page 



1-6. Uederella alpenensis, new species 47 



1, An example with branching more frequent than usual. 

 Middle Devonian (Traverse-Genshaw formation) , Long Lake, near 



Alpena, Mich. 



2, Basal portion of colony with details of growth obscured by 



branching and overlapping of tubes. 

 Middle Devonian (Traverse-Norway Point formation), 7-Mile 

 Dam, Alpena County, Mich. 



3, A small colony with branches crossing one another. 



4, A colony illustrating the typical method of branching and bud- 



ding of the tubes. 



5, Portion of fig. 4, X 8, indicating surface ornamentation and bud- 



ding of tubes in more detail. 

 Devonian (Traverse-Genshaw formation), near El Cajon Beach, 



Alpena County, Mich, 

 f). Youthful stage with initial branching almost at right angles. 

 Middle Devonian (Traverse-Gravel Point hmestone), Petoskey 



Cement Co., Petoskey, Mich. 

 7, 8. Hederella rugosa, new species (see also pi. 2, fig. 7) 49 



7, A colony illustrating the ancestrula, the rugose tubes arising 



from it succeeded by the normal, broader, less wrinkled 

 zooecia. 



8, The initial stage of the same colony, X 8. 



Hamilton (Ludlowvilie-Wanakah shale), Erie County, N. Y. 

 9, 10. Uederella magna Y{a\\,\^^\ '_ 51 



9, The original illustration of this species (after Hall and Simpson) . 



10, .\ branch showing the large, short, wide, and rapidly ex- 

 panding zooecia with flaring apertures. 



Hamilton (Ludlowville-VVanakah shale), Erie County, N. Y. 



1 1 . Hederella magna praecedens, new variety 52 



Photograph of Clarke's figured specimen of H. magna distinguished 

 by its shorter broad tubes with even diameter. 

 Oriskany: Becraft Mountain, near Hudson, N. Y. 



12. Hederella gracilior Clarke, 1900 48 



Photograph of the type illustrating the budding of the zooecia and 



the method of branching. 

 Oriskany: Becraft Mountain, near Hudson, N. Y. 

 78 



