574 Anxals of thk Carnegie Museum. 



and may easily be mapped on the scale of one-inch maps." As is 

 exj)lained on a preceding page, the divisions ^, B, and C, of 

 Brainerd and Seely, being based to some extent on faunal evidence, 

 correspond in a general way with the faunal divisions i, 2, and 3 of 

 the present article, but with a considerable difference in their upper 

 and lower boundaries in the various sections. If the formation is to 

 be subdivided on lithologic grounds, these divisions suggested by 

 Gushing are probably the best that could be chosen. The best test 

 of their utility is to examine the geologic maps which accompany 

 Gushing' s article. In most cases the colors of these maps correctly 

 represent the faunal divisions, but two exceptions may be ngted. At 

 Valcour, New York, all the region from the Valcour Fault north to 

 Day Point is colored as Day Point limestone (Lower Ghazy) while 

 the fauna shows that the strata of this region belong to the Middle 

 Ghazy, and the Lower Ghazy is met with north of Day Point only. 

 Again, at Ghazy there is a large region southeast of the village colored 

 as Grown Point limestone (Middle Ghazy), but the fauna shows that 

 about half of this area, east of the north and south highway, belongs 

 to the upper Ghazy. 



The Day Point limestone. Grown Point limestone, and Valcour 

 limestone as defined by Gushing are not true faunal units, and could 

 not be distinguished outside of the region between Ghazy and Valcour 

 Island, New York. 



Description of New Species. •'* 



Brachiopoda. 

 Crania prona %\>. nov. 



Ventral valve flat, or conforming to the object of cementation, to 

 which it is attached by its whole surface. Dorsal valve depressed, 

 conical, subrectangular in outline, usually wider than long. Apex not 

 prominent, a little jDosterior to the center. Surface marked by strong, 

 concentric lamellre of growth. On some specimens these lamellre are 

 woru smooth, while on others they turn upward, producing a rough 

 surface. 



"These species, like those described in the Avierican Journal of Scieiice, Vokime 

 XX, are described at this time without illustration only because it was necessary to 

 do so to make the faunal divisions. Figures are now being prepared, and will be 

 published in the next number of these Annals. 



