530 
PALAEONTOLOGY OF NEW-YORK. 
the name, so far as I know, except in a 
newspaper report at the time. At that time, 
1 had seen but a few fragments of the species, 
the first one having been discovered by Mr. 
J. B. Ellis of Albany; and it is only since 
the descriptions were in type that the speci¬ 
men, from which the accompanying figure 
2 has been made, was discovered by Mr. 
Whitfield among the shales at Normanskill. 
The constancy of the generic characters in 
two distinct species, and in at least half a 
dozen specimens, affords satisfactory evi¬ 
dence for separating this from any described 
forms. 
Fig. 2. 
Thamnograptus typus. 
Tlianmograptus capillaris (n. s.). 
Stipe extremely slender, flexuose or slightly divergent at the junction of 
the branches : branches diverging nearly at right angles to the stipe, 
capillary; hranchlets less divergent. Surface of stipe and branches 
marked by numerous indentations, which may indicate the place of 
cellules ? Substance of the stipe, branches and branchlets, nearly cy¬ 
lindrical. 
This species is an extremely slender form; the stipe, as 
preserved, being capillary, and the branches and branchlets 
still finer. It is not improble that what appears in the fragment 
as the main stipe, is a branch of a larger one; but its form 
and mode of branching preclude its identity with the preceding 
species. 
The figure is from a fragment of this species, twice enlarged. 
Geological position and locality. In the shales of the Hudson- 
river group : Near Albany. 
Thamnograptus capillaris. 
