632 R. ETHERTDGE ON THE PALAEONTOLOGY OF THE 



Genus Streptorhynchtjs, King, 1850. 



Streptorhynchtjs crenistria (Phill.). 



Spirifera crenistria, Phill. Geol. Yorksh. vol. ii. t. 9. f. 6. 



Orthis umbraculmn, Portlock; De Kon. Anim. Foss, du Terr. 

 Carbon. Belg. p. 222, t. 13. f. 4-7. 



Strophalosia striata, Morris. 



Orthis keolcuh, Hall, Eeport Iowa, 1. 19. f. 5. 



Streptorhynchus crenistria, Dav. Monogr. Carb. Brachiop., Pal. Soc. 

 p. 124, t. 26. f. 1, t. 27. f. 1-5, t. 30. f. 14-16. 



No more variable shell is known in the Upper Palaeozoic rocks 

 than the species under notice. It is also cosmopolitan, occurring 

 almost everywhere in the European and American Carboniferous 

 rocks. Only two specimens are known to me in the collection ; but 

 there is no doubt about them. In Worth America it ranges through 

 Iowa, Illinois, Indiana, Ohio, Tennessee, and Nova Scotia; and occurs 

 everywhere in Britain. Its varieties, Strept. arachnoides, S. senilis, 

 and 8. radialis, are common in the British Carboniferous rocks, also 

 in France and Belgium. 



Pew shells have received more careful study than this species, 

 owing to its extreme variation and universal distribution. It is also 

 one of the few species connecting the Upper Silurian, Devonian, 

 and Carboniferous group of rocks. As a Carboniferous form it 

 ranges through every stage and division of these rocks, and in every 

 country where developed, each author recognizes it under a different 

 name. Spitzbergen and Australia, India and America, Britain and 

 Europe, all lay claim to Streptorhynchus crenistria. Now we obtain 

 it from the limestones of Feilden Isthmus, lat. 82° 43'. 



Captain Feilden's specimens were collected at Peilden Isthmus, 

 lat. 82° 43'. 



Genus Ehynchonella, Fischer, 1809. 



Ehynchonella plettrodon (Phill.). 



Terebratula pleurodon, Phill. Geol. Yorksh. vol. ii. p. 222, t. 12. 

 f. 25-30. 



Rhynehonetta pleurodon, Dav. Monogr. Brit. Carb. Brach., Pal. 

 Soc. p. 101, t. 23. f. 1-15, 16-22. 



Our single specimen seems to be a characteristic Wiynchonella pleu- 

 rodon, according to Phillips, although I know how uncertain it is to 

 refer single specimens to any species ; this, however, is another link in 

 the evidence of the wide distribution of forms occurring in the Car- 

 boniferous rocks, both European and American. Eussia, Belgium, 

 Australia, and America claim this shell, occurring, as it does, almost 

 as profusely at the antipodes as with us in the Carboniferous Lime- 

 stone. We now record it from Feilden Isthmus, lat. 82° 43'. 



DEVONIAN. 



It is only through a few fossil Brachiopoda that I venture to 

 determine the presence of the Devonian rocks immediately south of 



