EXPLANATION OP PLATE Vll. 



VOLUTOMOBPHA CONEADl Gabb. (p. 71). 



Figs. 1. View of the type of the species. Acad. Nat. Sci., Phila. See also PI. vi. 



2,3. Profile and back view of a larger cast from Mr. M. E. Schenck's pits, New Jersey. 

 4,5. Two views of a cast showing imprints of surface marklugs, referred doubtfully to this 

 species. Acad. Nat. Sci., Pbila. 



VoLUTOMORPHA Gabbi Whitf. (p. 73). 



6. View of a cast showing surface features, but showing the different form of volution from 

 that of V. Conradi. Holmdel, New Jersey. 

 312 



