PLATE XXVI. 



page 



MODIOLA INFLATA Whit field 197 



Fig 1. Eiilargeil lateral view of the specimen described. 

 2. Cardinal view of the same. 



ISOCARDIA CONKADI Gabb 200 



Fig. 3. Lateral view of Gabb's type specimen. 



4. Anterior view of the same, cojiied from Gabb's figures. 



IDONEARCA MEDIANS Whitfield 199 



Fig. 5. Lateral view of one of the examples nsed in description. 

 6. Cardinal view of the same. 



Gryph^a Buyani var. precedens Whitfield I'M 



Fig. 7. Lower valve of a form which is very prevalent at New Egypt and in Monmouth 

 County. 

 8. Upper view of the same. 



GeypHjEa vesicularis Lamarck 194 



Figs. 9 and 10. Views of a form which is most abundant and quite characteristic of the 

 Yellow Limestones. New Egypt. 



Gky'ph^ostkea vomer Morton l'.)5 



Figs. 11 and 12. Views of the prevalent form in the Yellow Limestoms, at Timber Creek 

 and New Egypt, N. J. 



MoDiOLA ovata Gabb .^ I'J" 



Fig. 13. View of the right side of Mr. Gabb's type specimen. 



14. View of the anterior end of another siiccimen, preserving the form of the beaks 

 more perfectly. 



Idonearca compressirostra Whitfield 199 



Fig. 15. Right view of a very entire specimen. 

 16. Anterior profile view of same. 



Gastroch.«;na Americana Gabb 203 



Fig. 17. View of cast of this species, showing the irregular con.strictions of the tube. 

 18. A similar view of another cast. 



Teredo tibi alis Morton '.iOt 



l'"ig. 19. View of a part of a group of the tube casts, showing their usual form. Nearly all 

 of these have been broken off' at the lower end. 



20. Enlargement of the upper end of a cast, showing the muscular scar. 



21. Enlarged view of the aperture. 



22. Enlarged view of the upper end of a tube, showing the partial septa of this part 



of the tube. This and the two preceding figures are copied from Mr. Gabb'a 

 figures, but have all been verified in many individuals. 



320 



