i64 The American Geologist. ^^''^h, 1903. 
Favosites helderbergiae preecedens, n. var. 
Favosites niagarcnsis? Hall, Nat. Hist, N. Y. Pal., H, 1852, p. 324, pi. 
y^, figs, la-le. 
F. niagarcnsis is usually small and "spheroidal or irregular 
in form" in the Rochester shale, while F. helderbergiae of the 
Coeymans limestone is often in "large, lenticular, depressed 
convex or hemispherical" masses. The Cobleskill specimens 
are spheroidal to lenticular colonies up to six or eight inches 
in diameter, and the other characters are also those of F. 
helderbergiae^ and not of F. niagarcnsis. Since the Cobles- 
kill specimens never attain the size of the largest F. helder- 
bergiae (sometimes having a diameter of two feet in Albany 
county) to which they^ are related, it seems inadvisable to re- 
tain longer Hall's provisional identification. It may be known 
as' F. helderbergiae praecedens. The type specimens are in 
the U. S. National Museum- (No. 10,533) ^^^ came from 
Howe's cave near Schoharie, N. Y. 
This species is very abundant in the Cobleskill and is also 
found in the "Waterlime" or Rondout above. It also occurs 
plentifully about Litchfield, Herkimer county, N. Y., and in 
Pennsylvania, and Maryland. 
Halysites c tenularia var. 
Caienipora escharoides Hall, Nat. Hist. N. Y., Pal., H, 1852, p. 325. 
Occurs in the cement rock at Schoharie and between the 
two cement horizons at Rondout. A similar form is found in 
the Cobleskill in Pennsylvania and Maryland. At times the 
species is very abundant. 
Stromatopora constellata Hall. 
in form" in the Rochester shale, while F. helderbergiae of the 
pi. 72, figs. 2a, 2b. 
Nicholson* in his valuable "Monograph of the British 
Stromatoporoids" did not elaborate this species. However, he 
remarks that, if Cocnostroma constcllatnui Spencer is the same 
as Hall's species, then both are probably synonymous with vS". 
typica Rosen. Since Spencer's material came from the Upper 
Niagaran (Upper Lockport) and Hall's from the Lower Man- 
lius, it is not probable that both occurrences are of one species. 
Hall's name will be continued until the internal structure is 
determined. 
* Paleeontographical Society, London. 1886-1892, p. 173. 
