28 



CARBONIFEUOUS LAMELLIBRANCHIATA. 





Iberger Kalk 



Goniatitenkalk 



u. 



Cypridinen, 



Schiefer 



Kulm. 



Pecten 





• •■ 



perobliquus, grandaevus, 



>> 







Ooldf. ; aurilaevis, 

 subradiatus. 



Avicula 



Wurmii 



laevis 



uniplicata. 



Posidonomya 



• ■• 



venusta 



Becheri, Goldf. 



,, 





striato-sulcata 



carbonaria.' 



Pterinea 



crinita, concentrica 



amygdaloides 



lepida, Ooldf. 



Mytilus 



intumescens 



... 



incoDspicua, Phil. 



Conocardium 



trapezoidale 



... 





(Pleurorhynchus) 



aliforme clathratuin, 



Ooldf. 



lentiforme 







Cardium 



concentricum, v. B.^ 





)> 





retrostriatum, v. B.^ 

 auguliferum 





Cardiola 



concentrica 







Lucina 



sinnosa 







Cypricardia 



elongata 







Venus 



subglobosa 







Cardita 



••• 





baliotidea. 



Bronn and Romer's ' Letbeea Geognostica ' was published during the years 

 1851 — 1856, containing figures and descriptions of the genus Posidonomya, Bronn, 

 with P. Becheri ; and three other forms which were, however, not new, namely, 

 Fterina IsBvis, Goldfuss, and Conocardium aliforme, Conocardium hihernicnm, 

 Sowerby. 



1855. In Part II of the ' Report of the Geological Survey of Missouri,' issued 

 in 1885, Shumard describes and figures two new species of Carboniferous Pec- 

 tenid^, P. Missouriensis and P. occidentalism and one species of Myaliua, 

 M. suhquadrata, while Allorism,a Hannihalensis is described in a note on p. 206. 



In the volume for 1856 of the ' Bulletin de la Societe imperiale des Naturalistes 

 de Moscow,' tome xxix, 2e partie, is a paper by Eichwald, entitled " Beitrag zur 

 geographischen Verbreitung der fossilen Thiere Russlands (alte Periode)," the 

 following Carboniferous Lamellibranchs being described in it as new : 



Pecten megalotus. 



— midas. 

 Posidonomya viarginalis. 



— jallax, afterwards referred 



to Avicula. 

 Avicula nana. 

 Modilopsis conspicua. 

 Nucula exigua. 



Nucula carlonaria. 

 Schizodus sulcifi. 

 — eximius. 

 Astarte socialis. 

 CardiomorpTia distinct a. 



— striata. 



Cardinia concentrica. 

 Pholadomya connivens. 



1 Inoceramus carbonarius in the text. 



2 ? Cardium pectunculoides in the text. 



3 ? Cardium palmatum, Goldf., in the text. 



