62 PALEONTOLOGY OF NEW-YORK. 
FOSSIL PLANTS OF THE TRENTON LIMESTONE. 
Puates XXI. & XXII. 
In the soft shaly portions of this limestone, there are considerable numbers of the fucoid- 
like vegetable, fig. 1, pl. 22. They often appear as if attached by roots, but are never 
branched. More rarely species like fig. 1, pl. 21, appear upon the shaly surfaces of the 
limestone. 
Great numbers of obscure vegetable markings, or fragments of fucoid-like bodies, are 
frequently found in the shaly strata of the Trenton limestone, in nearly all localities where 
the surfaces are exposed. These bodies are coéxtensive with the rock, and even much more 
numerous in some western localities, and in Canada, than within the State of New-York. 
97. 2. BUTHOTREPHIS GRACILIS (n. sp.). 
Pu. XXI. Fig. 1. 
Stem slender, flattened, branched ; branches compressed, leaflike, subdichotomous, 
diverging, opposite and alternate ; no visible structure. 
This is a beautiful species, very similar to some of the linear-leaved Potamogetons. A 
carbonaceous film is all that remains of the fossil. It was probably a succulent marine plant, 
not unlike Fucus, but of a very slender form and habit. It occurs where the crystalline 
limestone is separated by thin shaly layers, upon which, and upon a shaly carbonaceous 
film on the limestone, this fossil is found. 
Position and locality. Jacksonburgh and Middleville, Herkimer county, in the central 
and lower portions of the Trenton limestone, (State Collection.) 
98. 3. ° BUTHOTREPHIS SUCCULENS (x. sp.), 
Pu, XXII. Figs. 2 a, 2. 
Fossil composed of thick succulent stems; stems branching; branches divergent, bi- 
furcating ; structure apparently cellulous, indistinct. 
This fossil resembles, in its thick succulent stems, the Saticornia. It is one of the most 
prominent and remarkable species in the rock. 
This is the Lithodendron dichotomum of Eaton, 
Fig. 2a. A portion of a large specimen, the branches scarcely compressed. 
Fig. 2 6. A single stem with branches, from another plant. 
Position and locality. In the Trenton limestone, Glen’s Falls, (Cabinet of the Troy Lyceum.) 
