156 
PALEONTOLOGY OF NEW YORK. 
In 1842 Mr. Vanuxem indicated the occurrence of Tentaculites ornatus of 
Sowerby, in the water-lime group of New York (Hydraulic lime rock of Eaton), 
giving a figure of the species which occurs in the Tentaculite limestone. 
In 1843 Mr. Mather adopted and published the same figure, as characteristic 
of the Tentaculite limestone, which was at that time recognized as the 
upper member of the water-lime group ( Geology of N. Y. Surv. First and 
Third Geolog. Dist.). 
In 1843 M. Castelnau described and figured Tcntaculites regularis and T. 
irregularis , from the Trenton limestone {Le systeme Silurien de VAmerique Sep- 
tentrionale)* 
In 1843 James Hall indicated Tentaculites scalaris, of Sciilotheim, as occur¬ 
ring in the Corniferous limestone at Le Hoy, in western New York. He also 
described and illustrated a new species, T. fissurella, from the Marcellus shale 
and Genesee slate ( Geology of N. Y. Surv. Fourth Geolog. Dist.). 
In 1847 the same author described and figured Tentaculites ? flexuosa, from the 
Trenton limestone ( Palaeontology of New York, vol. 1, pp. 92, 284, plates 29 
and 78).f 
In 1852 the same author described three species from the Clinton and Niagara 
groups of New York, viz., T. minutus, T. distans t (Palaeontology of New York, 
vol. 2, pp. 183, 184, pi. A 41, figs. 8 a-e, and 9 a, b); and T. Niagarensis (p. 352, 
pi. 85, figs. 11 and 12). 
* The occurrence of these two forms at Trenton Falls has not been verified by subsequent collections at 
that locality ; nor have these or any other species of true Tentaculites been found in the Trenton limestone 
either at that locality or elsewhere in New York. The name T. irregularis, of Castelnau, is suggestive 
of the characters of T. gyracanthns, which species may have been obtained from collectors living at 
Trenton Falls. The dark limestone in which it occurs is so similar to that of Trenton Falls that the 
character of the rock may also have influenced the conclusion that the specimens were from the Trenton 
limestone. 
f This species was referred to Tentaculites W'ith doubt. The apparently septate character is due to 
exfoliation of the exterior test, revealing the character of Cornulites ; and' in the reference to the species 
on page 284, it was compared with Cornulites serpularius of Schlotheim, as figured by Murchison (Sil. 
System). I expressed doubts of its identity with Tentaculites on account of its “ adhering to other bodies,” 
as well as “from its internal structure, which has not heretofore been shown in true Tentaculites.” “All 
the other species known in our strata are straight [or slightly bent from accidental causes during growth], 
ridged, and gradually tapering to a point, always separate, and never known as adhering to other bodies.” 
Subsequent examination has shown this fossil to be the base of a Cornulites, growing in small groups, and 
attached to other bodies. 
} The relations of this species require to be verified. 
