180 Annals of the Carnegie Museum. 



The specimen figured on Plate XLVII, figures 7 and 8, is in the 

 Carnegie Museum. That represented by figures 9 and 10, of the same 

 plate, is in the Cornell University Museum, and the originals of 4-6 

 are in the Yale University Museum. 



Raphistoma stamineum Hall. 

 (Plate XLVII, figures n-13; Plate XLVIII, figures 1-5; Plate LV, 



FIGURES 5-8. ) 



Raphistoma staminea Hall, 1847, Paleontology of New York, Vol. 1 



p. 29, PL 6, figs. 4, 5, 50. 

 Raphistoma planistria Hall, 1847, ibidem, p. 29, figs. 1, 2, PI. 6, figs 



?>a, ?>b. 

 Raphistoma planistria var. parva Hall, 1847, ibidem, figs, y, ^d, 3^ 

 Pleurotomaria sp. Hall, 1847, ibidem, p. 31, PL 6, fig. 8. 

 Scalites planistria Emmons, 1855, American Geology, Vol. 1, p. 159 



PL 4, figs. 16, 17. 

 Straparollus planistria Emmons, 1855, American Geology, Vol. 1, p 



233- 

 Straparollns angulatus Emmons, 1855, American Geology, Vol. 1 



P- 157- 



Scalites staminea Emmons, 1855, American Geology, Vol. 1, p. 159 

 Pleurotomaria calyx Billings, 1859, Canadian Naturalist and Geolo 



gist, Vol. 4, P- 455> ng s - 3°> 3 l , 3 2 - 

 Pleurotomaria crevieri Billings, 1859, ibidem, p. 456, figs. 33, 34, 35 

 Pleurotomaria pauper Billings, 1859, ibidem, p. 457. 

 Pleurotomaria calyx Billings, 1863, Geology Canada, p. 132, fig. 62 



This is a very common species in the lower layers at Chazy, New 

 York, and on Isle La Motte, Vermont, where hundreds of well-pre- 

 served specimens may easily be obtained. A careful study of these 

 specimens in comparison with the type of Billings' species, named 

 above, fails to reveal any specific differences and all must be referred 

 to Hall's species. 



Description. 



Shell of medium size, with five to seven whorls which enlarge gradu- 

 ally. Apex usually a little higher than the plane of the outer whorl, 

 but this is a variable character. In some specimens the upper surface 

 of the shell is flat or even concave, while in others the spire may be 



