DESCRIPTION OF NEW SPECIES, AND AN ENUMERATION, 
WITH REMARKS, ON SPECIES ALREADY KNOWN. 
FUCOIDES, OR MARINE PLANTS, * 
Genus CHONDRITES. Sternb., Vers. 2, p. 25. 
Frond cartilaginous; stem filiform, dichotomous; branches 
cylindrical. 
Chondrites Colletti, Sp. nov. 
Frond large, dividing fan-like into numerous crowded 
branches, dichotomous, either diverging on both sides of the 
main axis or arched on one side; ultimate divisions simple, 
linear, cylindrical, with irregular borders. 
This species is not as yet satisfactorily known. I have but recently received 
from Mr. John Collett, Eugene, Ind., some specimens of a black, fossiiiferous 
limestone, whose surface is marked with the remains of these plants, true Fu- 
coides. The species distantly resembles, by the curving of its branches, Fu- 
coides cauda galli, Yan. But it is evidently a compound of separate branches, 
dichotomous from near the base of the frond (the base is broken from the spe¬ 
cimen), the branches in dividing and ascending, forming fan-like or flabellate 
fronds. The branches, which are ultimately simple, leave upon the stone a 
half cylindrical impression, and are distinct from each other. The locality is 
indicated as Towle’s mill, five miles east of Lodi, Ind., and the geological posi¬ 
tion about the level of coal No. 1 of the Ill. section. If it is so, this black 
