KXPLANATION OF PLATE XLI. 



Pacliydomella (?) piesta, Eth.fiJ. 

 Fig. 1. Portion of the fossiliferous shell, or " miiseelband." 



Figs. 2 and 3. Imperfect examples extracted from the general 



mass as seen in Fig. 1. 



Staurocephalites grammoides, Eth. fJ. 

 Fig. 4. Two jaw plates, both about six millimetres in length. 



