606 Karl A. Grönwai.l. 



A. Species which begin in the Lower Carboniferous and ascend as 

 far as to the Permo-Carboniferous, or the Permian (stratigraphi- 

 cally worthless); 



B. Species which begin in the Lower Carboniferous deposits and 

 ascend into the Upper Carboniferous; 



С Species that have, hitherto, been found only in the Upper Car- 

 boniferous; 



D. Species that begin in the Upper Carboniferous and ascend into 

 the Permo-Carboniferous and Permian ; 



E. Species that have, hitherto, only been found in the Permian. 



Below we shall now group our forms into these divisions, when a 

 * will stand for the species belonging to the Lower group of the 

 Carboniferous deposits of North-east Greenland, while a f will signify 

 the species belonging to the Upper group. Forms respecting which 

 there may exist some doubt will be placed within parentheses in 

 the division to which we consider the species in question not to 

 belong. 



A. t Athyris Royssii L'Eveillé. 

 T Reticularia lineata Martin. 



* Productus longispimis Sow. 



(t Spirifer cfr. striatiis Martin). 



(t Productus inflaiiis M'Chesn.). = 3 Sp. 



B. t Spirifer cfr. striatus Martin. 

 '■■■ Productus punctatus Martin. 



(* — simensis Tschern.). = 2 Sp. 



С t Camarophoria cfr. Karpinskii Tschern. 



' Spirifer rectangulus Кит. var. alla п. var. ? 



* Martinia corcuhim Кит. 



* Productus simensis Tschern. 



-j- — Wallacianus Derby. 



t — Louéni WiMAN. 



t — timanicus Stucken в. 



-j- — pseudohorridus Wiman. = 8 Sp. 



D. Of this division, those species that ascend into the Permo-Car- 

 boniferous are marked PC. after the author's name, and those 

 that go up into the Permian with a P. 

 t Rhynchopora Nikitini Tschern. P. 



* Spirifer supramosquensis Nik. PC. 



* — Friischi Schellw. P. 



