MUSEUM OF COMPARATIVE ZOOLOGY. 29 



REPORT OX INVERTEBRATE PALAEONTOLOGY. 



By Percy E. Raymond. 



The rearrangement of the collection of trilobites has been con- 

 tinued during the year, and the Agnostidae, Harpedidae, and 

 Goldiidae finished. The study of the Agnostidae brought out 

 new points in connection with the classification of the trilobites 

 which were discussed in an article published in the American 

 Journal of Science. Some time was given to the final revision 

 of an article describing a number of new species of fossils from the 

 Trenton, collected by the writer and his assistant while members 

 of the Geological Survey of Canada. The major research of the 

 year relates to the appendages of trilobites, the unique material 

 in the Yale University Museum having been put at my disposal 

 for the purpose of gathering together for one publication all at 

 present known concerning the morphology of these organisms. 

 The results of this study will be published as a memoir by the 

 Connecticut Academy of Arts and Sciences. 



In September, 1916, I spent a week in collecting fossils from 

 the middle Ordovician formations of the Mohawk and Black River 

 valleys in New York, being accompanied by Mr. T. H. Clark, who 

 remained at Martinsburg for two weeks after my return, and made 

 a large collection, which he has presented to the Museum. 



In June of this year, on the invitation of a former student, 

 Prof. W. G. Foye, I spent a week in Vermont, devoting a part of 

 the time to field-work, and a part to the identification of fossils in 

 the Geological Museum of Middlebury College. In exchange 

 for my assistance in this work, the Museum received a good assort- 

 ment of duplicates from their material, including many specimens 

 new to the collection. 



In addition to material collected by the Curator, the Museum 

 has received during the year three drawers of Ordovician fossils 

 from Dr. Sidney Powers, one lot of Carboniferous and one lot of 

 Eocene fossils from Dr. D. C. Barton, and one drawer of Triassic 

 fossils from Dr. Alfred Wandtke. Prof. S. L. Powell has also sent 

 four boxes of Ordovician fossils from Virginia. 



