38 ANNUAL REPORT OF THE 



REPORT ON INVERTEBRATE PALAEONTOLOGY. 



By Percy E. Raymond. 



Two months of the summer of 1912 were spent in the field in 

 Canada, finishing work which was begun while in the employ of 

 the Geological Survey of that country, and in preparing material 

 for the guide books for the excursions of the 12th International 

 Geological Congress. In connection with this work, large col- 

 lections were made from the Ordovician of Ontario and Quebec, 

 and these have been assorted and identified during the winter. 

 By arrangement with the Director of the Geological Survey of 

 Canada, the Museum will retain a set of the duplicates, which will 

 add a large suite of specimens from formations and localities not 

 previously represented in the collections. 



During the Easter recess, the writer, in company with Mr. 

 Winthrop P. Haynes, Assistant in Geology, and a small party of 

 students, spent three days in collecting near Saratoga, in the lower 

 Mohawk Valley, and in the Helderbergs. We succeeded in getting 

 a quantity of material from the Upper Cambrian, Lower Beekman- 

 town, and Lower Trenton, including fossils from the typical locali- 

 ties of the Tribes Hill and Saratoga formations. 



The last two weeks in June were spent in visiting the Upper 

 Ordovician strata in the vicinity of Cincinnati, Ohio, and Rich- 

 mond, Indiana, and the Silurian about Chicago and Milwaukee. 

 The Museum possesses, in the Dyer and Day collections, very large 

 quantities of material from these localities, and the trip was made 

 primarily to see in the field the strata from which these collections 

 came. Incidentally, a number of interesting specimens were col- 

 lected. The writer is indebted to Dr. Ray S. Bassler of the United 

 States National Museum for guidance and information about 

 Cincinnati and to Mr. A. W. Asmuth for similar favors at Mil- 

 waukee. 



During July the writer took part in the Maritime excursion of 

 the International Geological Congress, acting as one of the guides 

 on this trip, and as leader on the Montreal-Ottawa excursion which 



