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, Van. 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 111. section. If it is so, this black 



