Devon and Cornwall, Belgium, the Ei/el, Sj-c. 



597 



IV. Table of genera and species distinct in both limestones. 



Ill Wenlock limestone, 

 CfiUSTACEA 3. 



Homalonotus delphinocephaliis. 

 Acidaspis Brightii. 

 Bumastus Barriensis. 

 Annelida 1. Spirorbis tenuis. 



MOLLUSCA. 



Cephalopoda 3. Nautilus undosiis 



(CI} menia ? Miiiister). 

 Lituites giganteus,L.? Biddulphii. 



Gasteropoda2. Nerita spirata,N.? 

 Haliotis. 



CONCHIFERA 0. 



In Eifel limestone. 

 Crustacea 0. 



Annelida 3. Serpula ammonia, S. 

 omphalodes, S. socialis. 



MoLLUSCA. 



Cephalopoda 12. Cyrtoceras de- 



pressum, C. compressum, C. 



annulatum, C. lineatum. 

 Spirida nodosa, S. costata, S. an- 



nulata, S. carinata, S. dorsata. 

 Goniatites subnautiliniis, G. mul- 



tiseptatus, G. orbiculus. 

 Gasteropoda 14. Turbo armatus, 



T. nodosus, T. cgelatus. 

 Trochus exaltatiis. 

 Pileopsis prisca, F. compressa. 

 Sigaretus? rugosus. 

 Rotella helicinajformis. 

 Pkasianella ventricosa, P. bucci- 



noides, P. fusiformis. 

 Turritella bilineata, T. striata, T. 



obscleta. 

 CoNCHiFER a23, Gypidia gryphoides. 



(Terebratula giyplius, Schlot.) 

 Strygocephalus Biirtini (Terebra- 

 tula rostrata, .S'cA/o^.),S.striatus. 

 Calceola sandalina. 

 Aptychus Icevigatus. 

 Pecten Neptuni. 

 Pterinea radiata, P. elegans*. 

 Modiola Goldfussii, 

 Cardium alaeforme, C. elongatum. 

 Lucina Proavia, L. lineata, L. 



rugosa. 

 Cyprina minuta. 

 Sanguinolaria concentrica, S. la- 



mellosa, S. dorsata, S. truncata, 



S. phaseolina. 



* M. Beyrich remarks that PterinecB are numerous, and in a manner 

 characteristic of the greywacke and slate rocks which support the Eifel 

 limestone. Besides the two species noticed above, Professor Goldfuss 

 enumerates the following as occurring in the greywacke and slate coun- 

 tries adjacent to the Rhine, namely near Ems, Pterinea ventricosa, P. costata, 

 P. lineata, P. plana, P. trigona, P. Icevis, P. elongata; in Siegen (and the 

 Harz) P. lamelloui; near Iserlohn, P. reticulata', and at Paffendorf (Coblenz) 

 P. carinata. This last species occurs also, with P. bicarinata, at Lindlar, 

 in the Berg territory. Of these fourteen species thus found in transition 

 tracts, two only have been observed in the carboniferous limestone, viz., 

 Pterinea elegans in theRatingen limestone, and P. carinata near Lewistown 

 adjoining Niagara in North America. 



