72 REPORT OF NATIONAL MUSEUM, 1922. 



falo, N. Y. ; and Miss Caroline E. Stringer, Omaha High School, 

 Omaha, Nebr. Mollusks have not been sent out in great numbers 

 or to many investigators. Prof. T. D. A. Cockerell, University of 

 Colorado, received 16 specimens of Madeira mollusks; Dr. H. A. 

 Pilsbry, Academy of Natural Sciences of Philadelphia, borrowed 

 two lots of specimens, mostly from Mexico and the West Indies. 

 The entire Philippine collection of planarians was sent to T. Kabn- 

 raki, of Tokyo, for examination and report. Plants from the Na- 

 tional Herbarium were sent to Oakes Ames, Boston, Mass.; Botan- 

 isches Museum, Berlin, Germany; University of California, Berke- 

 ley, Calif. ; Cornell University, Ithaca, N. Y. ; Academy of Natural 

 Sciences, Philadelphia, Pa.; Gray Herbarium of Harvard Univer- 

 sity, Cambridge, Mass.; University of Illinois, Urbana, 111.; New 

 York Botanical Garden, New York City; Leland Stanford Junior 

 Universtiy, Palo Alto, Calif.; Bureau of Science, Manila, P. I. 



The year's total of scientific papers published by members of the 

 stalf or based wholly or partly on our material by outsiders is 274, 

 distributed as follows: Mammals, 19; birds, 42; reptiles and am- 

 phibians, 5; fishes, 5; insects, 79; mollusks, G2 ; marine inverte- 

 brates, 25; echinoderms, 8; plants, 29. 



DISTRIBUTION AND EXCHANGE OF SPECIMENS. 



Duplicates distributed to schools, colleges, and institutions aggre- 

 gated 2,654 specimens, of which 1,043 were in seven sets of mollusks, 

 regularly prepared for this purpose. 



Exchanges to the number of 30,423 were arranged, 30,107 being 

 botanical. Among the 326 zoological specimens no specially impor- 

 tant exchange is represented; they were disposed of by the divisions 

 of mammals, birds, reptiles, marine invertebrates, and mollusks in 

 small lots as exchanges with various institutions and individuals. 

 The largest exchanges of plants (more than 1,000 specimens in each 

 exchange) were sent to the Arnold Arboretum, Harvard University. 

 Cambridge; Botanischer Garten und Museum, Berlin-Dahlem, Ger- 

 many; British Museum (Natural History), London, England; Field 

 Museum of Natural History, Chicago, 111.; Gray Herbarium of 

 Harvard University; University of Illinois, Urbana, 111.; Jardin 

 Botanique de l'Etat, Brussels .Belgium ; Museum d'Histoire Natu- 

 relle Botanique, Paris; Naturhistorisches Museum, Vienna, Austria; 

 New York Botanical Garden, New York City: Riksmuseets Bo- 

 taniska Avdelning, Stockholm, Sweden; Royal Botanic Garden, 

 Kew, Surrey, England; and Academy of Natural Sciences, Phila- 

 delphia, Pa. 



TOTAL NUMBER OF SPECIMENS IN DEPARTMENT OB' BIOLOGY, INCLUDING NUMBER OF DUPLI- 

 CATE SPECIMENS. 



As explained in previous reports, the numbers given below can 

 only be approximately correct. It would manifestly be impossible to 



