KEPORT OF NATIONAL, MUSEUM, 1921. 93 



assistants in the future than in the past, the outlook is indeed dis- 

 couraging. Many of these collections are large and of great scien- 

 tific interest, as, for instance, those of the igneous rocks of the 

 Yellowstone Park described by the late Dr. J. P. Iddings, as well 

 as those of the Pacific and South Sea Islands. These need to be 

 numbered and marked individually in a manner to insure them 

 against being lost or mislaid through careless handling. Now they 

 simply lie in pasteboard trays with labels mainly in pencil, and 

 nothing to serve as a connecting medium between the two. The 

 overturning of a tray, thus separating specimen from label, would 

 therefore result in complete ruin. 



Paleontological researches included those by Secretary Walcott 

 on the appendages of the trilobite and related Crustacea, upon which 

 subject he has practically completed a memoir. 



Curator E. S. Bassler, in association with Ferdinand Canu, com- 

 pleted the concluding volume of their studies on the American 

 Cenozoic Bryozoa, as well as certain researches entitled " Studies on 

 fossil and recent Cyclostomatous Bryozoa." 



Dr. E. O. Ulrich's monographic studies on the early Paleozoic 

 faunas have progressed to a point where they are nearing com- 

 pletion. With Doctor Bassler he has undertaken a monograph em- 

 bracing some 400 species of Silurian Bryozoa and Ostracoda of 

 Maryland, which will be published by the geological survey of that 

 State, and in association with Dr. C. E. Eesser, has continued work 

 on the Upper Cambrian faunas of the Mississippi Valley, having 

 practically completed the description and illustration of several large 

 families of Early Paleozoic trilobites. 



Dr. Frank Springer has begun studies preparatory to a monograph 

 on the Silurian Crinoidea of North America, forms in which his 

 collection is especially rich. 



Dr. T. W. Stanton has continued work on the invertebrate faunas 

 of the Comanche series of the Cretaceous, and Dr. F. H. Knowlton 

 has completed a manuscript on the fossil plants of the Miocene Lake 

 Bed formation of South Central Colorado, and is now engaged on a 

 revision of the flora of the Green River formation. Dr. Mary J. 

 Eathbun identified a small collection of fossils from Trinidad, ob- 

 tained by J. A. Bullbrook and F. W. Penny. 



Mr. C. W. Gilmore completed a short paper on the fauna of the 

 Arundel formation of Maryland, and a semipopular account of the 

 horned dinosaurs for the Smithsonian annual report, both of which 

 are now in press. The manuscript and illustrations for an article 

 descriptive of the extinct lizard Saniwa ensidens Leidy are nearing 

 completion, and a report on the Cretaceous fossil Eeptilia of the 

 State of North Carolina was prepared for the geological survey of 

 that State. 



