Manlius Formation of Nezv York. — Schuchert. 165 
Stromatopora concentrica Hall. 
Stromatopora concentrica Hall, Nat. Hist. N. Y., Pal., H, 1852, p, 325, 
pi. 72i, %s. 2-2b (not of Goldfuss). 
Nicholson has shown* that 5". concentrica Goldfuss, with 
which Hall identifies the Niagaran and Cobleskill specimens, 
is restricted to the Devonic of Europe. It has long- been known 
that S. concentrica Hall means little or nothing and until the 
internal microscopic structure is worked out, these stromato- 
poroids have no stratigraphic nor biologic significance. 
Orthothetes interstriatus (Hall). 
Orthis inferstriata Hall, Nat. Hist. N. Y., Pal., H, 1852, p. 326, pi. 74, 
figs. la, lb, 2a, 2b. 
Streptorhynchus hydraulicum Whitfield, Annals N. Y. Acad. Sci., II, 
1882, p. 193; — Ibidem, V, 1891, p. 508, pi. 5, figs. 1-3; — Geol. 
Ohio, VII, 189s, p. 410, pi. I, figs. 1-3. 
Orthothetes interstriatus Schuchert. Bull. U. S. Geol. Surv., 87, 1897, 
p. 297. 
Orthothetes hydraulicits Grabau, Bull. Geol. See. Amen, XI, 1900, p. 
365, pi. 22, figs, la.-lc. 
This is one of the most widely dispersed species of the 
Cobleskill. It is also found about Litchfield, and Buffalo, 
New York, and in Maryland and Pennsylvania. 
Stropheodonta (Leptostropha) bipartita (Hall). 
Lepntrena bipartita Hall, Nat. Hist. N. Y., Pal, II, 1852, p. 326, pi. 74, 
figs. 4a, 4b, 5a. 
Also occurs about Litchfield and in the cement beds (Rond- 
out) at Schoharie, N. Y. 
Stropheodonta (Leptostrophia) textilis (Hall). 
Strophodonta textilis Hall, Nat. Hist. N. Y., Pal., II, 1852, p. 327, pi. 
74, figs. 6a-6J. 
Chonetes jerseyensis Weller. 
Chonetes jerseyensis Weller, Ann. Rep. Geol. Surv. N. J., for 1899, 
1900, p. 8, foot-note. 
This is a peculiarly marked species of Chonetes. The 
coarse striae present their convex curvature to the cardinal 
margin and converge slightl-y in the medial part of the valves. 
Once seen, this shell is not easily confounded with any other 
species. There is but one other form of this kind in America, 
C. macrostriata Walcott, which, although described from the 
* Pal. Soc, London, 1886-1892, p. 2, 91, 164. 
