NORTllUMBEKLAM) AND UUllUAM. 255 



Russian specimens, I cannot settle this point. In the " Versteine- 

 rnngen," pi. 4, figs. 51, 52, Geinitz refers some examples to the 

 Terehratula superstes, de Vern., which undoubtedly belong to this 

 sj^ecies. Mr. King thinks that some specimens figured by 

 Geinitz under the above name, " Verst." pi. 4, figs. 48, 49, be- 

 long to another species, but the figures referred to are only 

 more plaited than usual. Similar specimens occur occasionally 

 at Dalton, which also Mr. King is inclined to refer to our 

 C. Humhletonensis ; but I can say with confidence that this last 

 species never occurs in that locality. 



This most characteristic Brachiopod occurs rather plentifully 

 in the shell- limestone of this district, and very sparingly in the 

 compact-limestone. 



2. C. GLOBULINA, PllUl. 



This is a very distinct species, though some authors only par- 

 tially acquainted with it have united it with the preceding. 



Its sj^herical form, constantly biplicated sinus, and the com- 

 parative smallness of the size it attains to, would be sufficient 

 alone to separate it from all other Permian species ; but in ad- 

 dition to these external characters, the apophysary system is also 

 slightly modified, and it retains its specific appearance in all the 

 numerous localities in which it occurs. 



Baron Schauroth has lately figured a German example of it, 

 which he refers to the preceding species. Last summer I had 

 the pleasure of obtaining several good specimens of it from the 

 shell-limestone of PiJssneck, where it is not rare. 



It occurs in the compact, and shell-limestone, sometimes very 

 plentifully. 



3. C. HuMBLETONENsis, Iloicse. PI. XI. figs. 3, 4. 



" Shell subtrigonal or obovate ; perforated valve tvith a simis in 

 the middle, rounded towards the lateral margins ; imperforated valve 

 high in the middle, depressed towards the sides ; the front margin of 

 the sinus and sides produced horizontally a short distance from the 

 cavity of the shell; surface, with numerous p)laits in the sinus, ichich 

 are sometimes bifurcated, and a few on the sides, granulated. 



