MUSEUM OF COMPARATIVE ZOOLOGY. 27' 



REPORT ON INVERTEBRATE PALAEONTOLOGY. 



By P. E. Raymond. 



Mr. T. H. Clark and the Curator spent two weeks in June of 

 this year in collecting in Maine, Quebec, and New York. We 

 were unusually fortunate in obtaining fossils at Quebec and Levis, 

 from exposures which are seldom accessible, the suite from the 

 Normanskill at Mountain Hill being the best ever obtained there. 

 The old, almost forgotten locality in the Devonian, on the River 

 St. Andre, Aubert de LTsle, Quebec, was rediscovered, and a large 

 and interesting collection of corals secured. 



The chief work of the year was the beginning of the compilation 

 of a bibliography of the genera of trilobites, toward which about 

 1,000 cards were prepared. In addition to this, the Chazyan 

 sponges of eastern North America were studied and described. 

 Several new genera and species were founded on M. C. Z. speci- 

 mens. A number of shorter papers was also written. 



The Walcott collection of thin slices of trilobites was loaned to 

 Dr. C. D. Walcott, who restudied it, had some of the sections 

 ground thinner, and photographed a large number of them. A 

 second collection of Cretaceous Bryozoa was loaned for study to 

 Dr. Ray S. Bassler. 



An unusually valuable gift received from the Peabody Museum 

 of Yale University, through Prof. Charles Schuchert, consisted of a 

 series of specimens of Triarthrus becki, showing appendages. 

 These specimens formed a part of the original set prepared and 

 studied by Prof. C. E. Beecher. In addition, a quantity of the 

 material as it came from the quarry was also presented. 



The accessions, other than those referred to above, have been as 

 follows: — Donations — Mr. J. A. Noble, fossils from Montana; 

 Dr. Sidney Powers, molluscan trails from Texas; Mr. Joseph T. 

 Tower, Jr., Carboniferous fossils from Alaska; Mr. W. H. Bier- 



