REPORT 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 
everturning 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 R. 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. Resser, 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. 
Rathbun 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 Reptilia of the 
State of North Carolina was prepared for the geological survey of 
that State. 
