30 ANNUAL REPORT OF THE 



REPORT ON INVERTEBRATE PALAEONTOLOGY. 



By Percy E. Raymond. 



During the year, the rearrangement of the collection of trilobites 

 was advanced by bringing the material into zoological order, and 

 by the distribution of a quantity of unassorted specimens to their 

 proper places in the series. The Odontopleuridae and the Lichad- 

 idae were newly identified and relabeled, and a study made of the 

 genera of each family. An extensive revision of the Lichadidae 

 was completed for publication, and a shorter paper on the Odonto- 

 pleuridae has already been printed. Considerable time was 

 devoted to the finishing of the report on the Ordovician of the 

 Baltic Provinces, and to the labeling and identification of various 

 miscellaneous collections of fossils other than trilobites. The 

 collection of trilobites occupies 480 Museum trays, and the con- 

 tents of 244 of them have been identified and relabeled since the 

 writer has been Curator. The principal families still to be ar- 

 ranged are the Phacopidae, 80 trays, Proetidae, 30 trays, Olenidae, 

 40 trays, and Goldiidae, 20 trays. 



A new feature has been the gathering together and the rear- 

 ranging of a large amount of material to form a stratigraphic 

 collection. This work required a great deal of sorting, labeling, 

 and shifting of specimens among the four rooms, not only to 

 obtain the specimens, but to make room for the collection. The 

 result has been the assemblage of quite a representative series of 

 Palaeozoic fossils, occupying 600 Museum trays and arranged in 

 stratigraphic order. This collection consists mainly of material 

 taken from the Whitney, Hyatt, Walcott, Burr, Perry, Hartt, 

 and Jackson collections, supplemented by material from the 

 general collection and various lots obtained by the Curator. A 

 beginning was made on the arrangement of a similar collection 

 from the Mesozoic and Caenozoic formations, but in these lines 

 the Museum needs much more American material. 



Field-work was confined to a single short trip. In May, after 

 a visit to Yorktown with students, I spent three days in the 

 Catawba Valley, near Salem, Virginia. Thanks to the guidance 



