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EUSARCUS GRANDIS, Grote and Pitt, 

 Was based upon a larger fragment of Eurypterus scorpionis. Now 

 it happens that I have five fragmentary specimens of different 

 sizes, ranging in length from 4 1-2 inches to about 32 inches, 

 but here the difference ceases. All other characteristics are alike, 

 and it plainly shows the fallacy of basing a new species on size 

 only. All the different specimens simply show different stages of 

 growth, and Eusarcus graiidis has to be dropped entirely from the 

 Waterlime fauna, because it represents merely a more nearly 

 full-grown specimen of Eiisarcus {^Eurypferus) scorpionis. 



All the specimens were obtained from the Waterlime group, 

 near Buffalo. 



In the same beds which yielded the above described Crustacea, 

 I found a number of small plant remains, which were submitted 

 to Prof. Lesquereux, Columbus, O., who kindly sends the fol- 

 lowing description : 



ON FRAGMENTS OF A SPECIES OF MARINE PLANT FOUND IN 

 THE WATERLIME GROUP NEAR BUFFALO. 



The plant is represented by a large number of small fragments 

 irregularly deposited upon slabs of limestone, as if they had been 

 spread around by the waves. The fragments are black, their 

 texture transformed into a carbonaceous substance, all flat or 

 flattened by compression or maceration, with borders parallel, 

 distinct and regular. They are evidently remains of marine 

 Algae and referable by their characters to the order of the Floridecs 

 and to the genus Chondrites as established by Sternberg. 



Chondrites St. — Fronds cartilaginous (in living plants), filiform, 

 sometimes robust and subcaulescent, dichotomous in their pri- 

 mary divisions, with branches and branchlets sometimes subpin- 

 nate, cylindrical, generally compressed and flattened in the fossil 

 state. 



To this genus, which includes part of the old genera Fucoides 

 and Gigartinites of Brongniart, are referred now all the fossil 

 Algae with frond cylindrical, generally filiform, many times 

 dichotomous, rarely pinnatified or irregularly branching, with 



