PLATE XXVIII. 



Page. 

 Nkkitinw tishm Meek 127 



Fig. 1. Dorsa] view of Week's typo specimen, enlarged. 



2. Aperture view of same, 



Nal. Mils. Cat. In veil. F 088., 7883. 



3. Dorsal view of the type of Nerilina pisiformis (after White), 



N i kiii x.\ [ncompta White - L28 



[Tigs. 4,5, Opposite views of the type specimen (Miter While). 



Nkritina ( Vklatella) patelliformis Meet L28 



Figs. 6, 7, 8. Three views of one <«i i lie typo specimens (after White). 



9, 10. Two views of the type of the variety webereneia (after White), 



GLAUCONIA OOALVILLKNSIS Meek L32 



Fig. 11. Dorsal view of an example from southern Utah. (Sec PI, \i\.) 

 Nat. Mus. Cat. Invert. FosS., 8249. 

 TURRITELLA WHITE] n. sp 130 



Fig. 12. Dorsal view of an average specimen from Upper Kanab, Utah, 



Nat. Mus. Cat. Invert. FosS., 22905. 



Figs. 13, 11, L5. Three specimens from Huerfano park, Colorado. Nos. 13 and 

 15 have the outer surface of the shell somewhal exfoliated. The 

 revolving ridges <»n No. II are more distinctly nodose than the 

 figure indioates. 



Nat. Mus. Cat. Invert. Foss., 22906. 



Fig. 16. An example with a peculiar aspeot due to exfoliation of the shell, 

 Nat. Mus. Cut. invert. FosB.. 22907. 

 248 



