BIBLIOGRAPHICAL SKETCH. 



21 



Pulastra ? antiqua 

 Cardium aliforme 

 Cucullxa unilateralis 



— trapezium 



— angusta 



— Hardingii 

 Avicula Damnoniensis 



— subradiata 



— pectinoides 

 Fecten nexites 



— transversus 



— plicatus 



— arenosus 



Some from Marwood Quarry ; all from the Barn- 

 staple and Petherwin Group. 



J 



1840. Eicliwald's paper, " Die Thier-und Pflanzenreste des alten rothen Sand- 

 steins und Bergkalks in Novogrodschen Gouvernemeut," was published in the 

 ' Bull, scient. Acad. Imp. Sci. St. Petersbourg,' t. vii, 1840. He enumerates the 

 following Carboniferous bivalves : 



Nucula cardiiformis. 

 Cardium exiguum. 

 Fterinea lievis (Bronn). 

 Fecten tenuissimus. 



— Nox. 



Unto (Sanguinolaria) sulcatus, Phill. 

 — — Isevis. 



Casts of a shell like either Pholadomya 

 or Solen. 



No plates are given, but a short description of each species. 



In another publication, ' Die Urwelt Russlands durch Abbildungen erlautert,' 

 the first part of which is dated in the same year, figures and descriptions are 

 given of Anodonta tenera, A. tenuissima, and Mytilus fragilis. The last has 

 deep concentric hollows, reminding the observer of Posidomomya vetusta, Sow. 

 But Eichwald does not appear very certain as to the real nature of the shell, for 

 he says, " Sie steht allerdings dem Mytilus oder der Modiola zunachst, Konnte 

 aber doch zu einer andem Grattung, vielleicht gar zu Anodonta gehoren, wenn sie 

 vollstandiger bekannt ware die Zeichnung ist nur entworfen, um auf ihre allgemeine 

 Form aufmerksam zu machen." 



In a still later publication, ' Bull. Soc. Nat. Moscou,' 1856, p. 565, he thinks 

 his M. fragilis identical with M. Teploivii (sic), de Vern., ' Paleont. de Riissie.' 



1841. In the first volume of the ' Transactions of the Manchester Geological 

 Society,' 1841, is published Captain Thomas Brown's paper entitled "Description 

 of some New Species of Fossil Shells, found chiefly in the Yale of Todmorden, 

 Yorkshire," with a plate of seventy-eight figures, fourteen of which are those of 

 Lamellibranchs. Six of these forms are referred to Catillus, and should now 

 be referred to Posidoniella, de Koninck. The shells were all collected by 

 Mr. Gibson of Hebden Bridge, in whose cabinet they are stated to be. 



