REPORT OF THE STATE PALEONTOLOGIST 1899 675 



Nematophytum, which has, by the favor of Prof. D. P. Pen- 

 hallow of McGill university, been identified with his Nemato- 

 phytum 1 o g a n i. When originally found, the length of 

 this alga was 24 feet. Visitors during a number of years 

 carried away parts of the trunk, till at the date referred to only 

 about 12 or 14 feet remained. As a result of the writer's sugges- 

 tion, the specimen was obtained by the director of the state mus- 

 eum and now makes a striking specimen in its collection. Subse- 

 quently Mr Cooley uncovered several more such great trunks, and 

 the writer has visited the locality to see if any of them would be a 

 material addition to that which we already have. The other 

 specimens how T ever are much shorter and less perfectly preserved, 

 and it has therefore seemed unnecessary to incur expense in order 

 to acquire additional examples of this great seaweed. 



Oriskany section at Schoharie. Investigations have been made 

 at Schoharie to elucidate the detailed succession of the rock strata 

 above the top of the Helderbergian formation. 



Hydraulic limestones. In company of D. D. Luther, special field 

 assistant, some time has been spent in studying the character of 

 the hydraulic limestones and the beds above them in the vicinity 

 of Union Springs, Cayuga co., where important collections and 

 interesting results were obtained. 



Investigations were also made in Erie co., with results which 

 have an interesting bearing on the problem of the dividing line 

 between the Siluric and Devonic systems. 



Hydraulic and Marcellus limestones in Onondaga co. D. D. 



Luther, special assistant, has continued his investigations of the 

 hydraulic limestones and their fauna eastward into Onondaga co., 

 and in connection therewith has made observations on and collec- 

 tions from the Agoniatites limestone of the Marcellus beds. The 

 latter investigations have been for the purpose of determining 

 whether or not this remarkable limestone is continuous with the 

 Stafford limestone of the Marcellus beds, which appears at its 

 best development at localities in western New York where the 

 Agoniatites limestone has lost its characteristic features. The 



