EXPLANATION OF PLATE IX. 



Tritonidba obesa. Whitf. (p. 79). 

 FlQS. 1-3. Views from two different individuals of the species. 



TUKBINELLA ? PARVA Gabb. (p. 80). 



4. Summit view, natural size, of the type specimen. 

 5, 6. Back and front views of the same enlarged. Acad. Nat. Sci., Phila. 



TURBINBLLA ? SUBCONICA Gabb. (p. 81). 



7, 8. Two views of the type specimen. Acad. Nat. Sci., Phila. 

 Vasdm conoides Whitf. (p. 83). 

 9, 10. Two views of the specimen ; one natural size, the other enlarged. 



EUTHRIA (?) FRAGILIS Whitf. (p. 78). 



11, 12. Two views of the specimen used, one natural size and one enlarged. 



VOLUTOMORPHA PONDBEOSA Whitf. (p. 72). 



13, 14. Two views of a large specimen from Holmdel, New Jersey. 

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