10-i The American Geologist. August, i89i 
undoubtedly what it has long been known to be. viz. : the coexis- 
tence of Rhynchonella cuhokles. The accuracy of regarding the 
Tally as the time eciuivalent of the Cuboides fauna, even though 
it were by virtue of this fact alone is, of course, beyond contra- 
vention. 
Another significant feature in the correlation of the New York 
Intumescens fauna is the abundance of certain species of conifer- 
ous woods. These are of much more frequent occun-ence in the 
first appearance of the fauna, than in its reappearance, one species, 
described h\ Sir William Dawson as Dadoxylon chirkii. being ver}' 
common and occasionall}' appearing in the Naples beds above. Sir 
William has also identified the species D. newherryl Dawson, and 
Cladoxylon mirahih Unger, from^ithe Styliola la\-er. The last of 
these species was described from the Cj'pridinen-schiefer (Entomi- 
den-schiefer, T. K. Jones) of the Thuringian Forest (Saalfeld)* 
and identified b}- Dawson in 1882. t In a recent paper+ on these 
fossil woods Sir William sajs in regard to the species D. {Cor- 
daioxylon) clarkii (p. 243); "I may now add that the species is 
very near to Arauca rites ungeri of Gappert, from the Cypridinia 
shales of Thuringia. This species appears to be the same with 
that originally described b}' Unger as AporoxyJon primigeniiim. 
The original description and figures of Unger did not permit an 
exact comparison, but as now figured hy Stenzel in his revision of 
Ga?ppert's species, it approaches so near to D. clarkii as to suggest 
the suspicion that it ma}' be the same or a very closely allied 
species." 
In the same paper professor Peuhallow discusses at some length 
finel}' preserved specimens of Kalymmn grandis Unger (the 
original also from the Cj'pi'indinen-schiefer at Saalfeld), from the 
Black Shale of Moreland, Kentucky, a horizon which, though 
little studied, will probal)lv prove equivalent to that of the Styli- 
ola la3'er. ? 
These woods introduce an interesting element into the association 
of fossils of the Intumescens zone, seeming to indicate a more 
rapid migration of the terrestrial flora which characterized the 
*Ii(Mtr. zur Palaontologie des Thiiriuger Waldes, Zweitor Theil, p. 93, 
1)1. xii, figs. 6, 7. 18.56. 
fFossil Plants of the Erian and Silurian of Canada, pt. ii, p. 126. 1.882. 
JNotos on Specimens of Fossil Wood from the Erian (Devonian) of New 
York and Kentucky, hy Sir William Dawson and Prof. D. P. Penhallow; 
Canadian Record of Science, vol. iv. January. IS'.tl. 
§Dr. C. E. Beecher, whocolleeted the specimens of Trdhjinma grandis 
referred to, informs the writer that Oonlatltes Intumesccm occurs in the 
same rocks. 
