502 
W. Teppner, Plagiostoma Frauscheri nov. spec. etc. 
The ahove name lias bin published for an English fossil, and, 
as I liave not the means of disproving the identity, I have 
permitted it to remain witli a mark of donbt. The sh eil, like 
mort of the oyster tribe, has a tendency to gread Variation, and 
the muscle-mark partakes of the varying form of the Shell. Since 
the above was written, I find the following observations by 
M. Deshayes, in „Hist, des An. sans vert. du bassin de Paris“, j 
Fig. 2. Vulsella Woodi Teppner. 
(Nach Wood, „The eocene Mollusca“, Taf. IX Fig. 2a— c.) 
p. 51 : „L’espece est citee dans le bassin de Londres par M. Marris; 
mais ä Barton eile est accompagnee d’une autre tres-distincte, 
beaucoup plus rapprochee par ses characteres d’une espece vivant 
de la Mer Rouge, et d’une autre fossile du terrain nummulitique de 
Finde que M. D. Archiac a fait connaitre sous le nom de Vulsella 
legumen (aber nicht lignium , wie Wood und Deshayes schreiben“). 
„I have made every effort to see the specimens liere reffered 
to, but without success. I am not aware that the genus has 
been found in the London basin, or anywhere but at Barton; and 
all the specimens that I have seen may, in my opinion, be reffered 
to one species, but wheter that be the true deperdita I cannot say.“ 
