PLATE XLUI— Continueil. 



Meristella Haskinsi, Hall. 



See Plate 44. 

 FigB. 23, 24. Di'i'sal ami jji-ofile views of the usual form of the species. 

 Hamilton shales. Moscow, N. Y. 



Meristella Baukisi, Ilali. 



See Plate 44. 

 Figs. 25, 26. Ventral and dorsal views of different shells, giving the external characters. 

 Limestone of the Marcellus shales. Stafford, N. Y. 



Merlstella kostkata, Hall. 



Fig-8. 27, 28. Dorsal ami profile views, showing the usual form and size of the species. 

 Tully limestone. Ovid, N. Y. 



Meristella Meta, Hall. 



Figs. 29, 30. Dorsal and ventral views of an adult specimen. 

 Hamilton group. Delphi, N. Y. 



