126 E. M. Kindle — Silurian Fauna in Western America. 



They Lave been found in northeastern Alaska, in southeastern 

 Alaska, and in northern Utah. 



Alaskan fauna. — Just within the Arctic circle in eastern 

 Alaska, in the Lower Ramparts of the Porcupine River, the 

 writer has collected a fauna of distinctly Aliclclle Silurian age 

 and closely allied to the Niagaran fauna of the eastern United 

 States. A partial list of this fauna follows. 



Silurian fossils from the Lower Ramparts, Porcupine Hirer, 



Alaska. 



Lichenaria cf. concentrica Hall Atrypa reticularis (Linn.) 



Favosites cf. favosus Goldf. Atrypa cf. calvini Neitleroth. 



Columnaria sp. Leptwna rhomboidalis (Wilck- 

 Alveolites sp ens) 



Diphyphyllum sp. Leptama cf. quinquecostala 

 Zafihrentis? sp. McCoy 



Camarotcechia ci.borealis (Schl.) Leptcena n. sp. 



Mhynchotreta cuneata Dalm. Nucleospira pisiformis Hall 



Camarotcechia sp. Dalmanella cf. elegantula (Dal- 

 Camarotcechia neglecta Hall man) 



Strickland inia sp. Streptis f/reyi Davidson 



Meristella? cf. subundata McCoy JBarrandella liny uf era Sow. 



Meristina nitida Hall ISpirifer nobilis Barr 



Meristina sp. iStrophostylus sp. 



Atrypina, n. sp. C ypricardinia arata Hal] 



Reticidaria cf. p> r <>xima Kindle C ypricardinia n. sp. 



Anastrophia cf. brevirostris lllcenus armatus Hall 



(Sow. ?) Hall ISphwrexochus cf. romingeri 

 Pentamerus oblongus (Sow.) Hall 



Stropheodonta sp. Encrinurus sp. 



Strophonella cf . macra M. & W. Proetus sp. 



The Porcupine River fauna contains species which link it 

 with the Silurian faunas of both Europe and America. Of 

 these Rhynchotreta cuneata, Spirifer nobilis, and Pentame- 

 rus oblongus have long been known in both European and 

 American faunas. The peculiar little twisted brachiopod 

 Streptis greyi has been recognized at but one other American 

 locality, however. Williams- has reported it from the St. 

 Clair limestone fauna of Arkansas. In Europe it occurs in 

 the Silurian of Bohemia, in England, and at the island of 

 Gotland. 



The Silurian fauna of the type represented by the species 

 listed here is known to have a wide distribution throughout 

 the world. It is well known in various parts of Europe and 

 has been recognized in regions as remote as China,f .New Zea- 



* This Journal, vol. xiviii, p. 331, 1894. 



fRichthofen, F. von, China, vol. iv, pp. 34-74; Mem. de la Soc. Roy. 

 des Sci. de Liege, 2d ser. , vol. vi, 1876. 



