EXPLANATION OP PLATE VIII. 



VOLUTOMORPHA GrABBI Whitf. (p. 73). 



Figs. 1. View of a small specimen from Holmdel, New Jersey. 



2, 3. View of a cast from Mullioa Hill, New Jersey. Acad. Nat. Soi., Phila. 

 4. View of a cast of the species ? from Marlboro, New Jersey. 



VOLUTOMORPHA PONDEROSA Whitf. (p. 72). 



5, 6. Two views of an imperfect cast from Neversink, New Jnrsey. 

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