ANNOTATED LIST OF THE RECENT BRACHIOPODA IN 

 THE COLLECTION OF THE UNITED STATES NATIONAL 

 MUSEUM, WITH DESCRIPTIONS OF THIRTY-THREE NEW 

 FORMS. 



By William Healey Dall, 



Honorary Curator of Mollushs, United States National Museum. 



The collection of recent Brachiopods, in the United States Museum 

 began with the material obtained by the United States Exploring 

 Expedition under Wilkes, mostly in the Magellanic region. Since 

 then the chief additions have been received from the dredgings of the 

 steamers of the United States Coast Survey and the United States 

 Fish Commission, now the Bureau of Fisheries ; my own dredgings in 

 the North Pacific and Bering Sea; and the material in the Jeffreys 

 Collection purchased by the United States National Museum, chiefly 

 comprising specimens from the North Atlantic and the Mediterranean 

 Sea. Valuable contributions have been received from the West 

 Indies and Florida dredgings of Mr. J. B. Henderson, jr., and from 

 the University of Tokio, collected by Prof. E. S. Morse. Miscella- 

 neous small purchases and exchanges have filled various gaps. 



The total reserve series now contains 181 diflPerent forms repre- 

 sented by over 6,000 specimens from various localities, including 

 many original types, and of these some 33 are new. Our principal 

 weakness lies in the absence of some recently described forms from 

 the southern hemisphere, and a few of the abyssal rarities. 



I have not had the privilege of examining the collection of the late 

 Thomas Davidson now in the paleontological department of the 

 British Museum (Natural History), but with this possible exception 

 the collection in the United States National Museum is, I believe 

 unrivaled. 



In the preparation of the list the classification of Beecher and 

 Schuchert has in the main been followed, supplemented by data from 

 later researches. 



In reviewing the nomenclature it was found that some changes 

 were necessary, due to the fact that Dr. Thomas Davidson, Mr. J. 

 Gwyn Jeffreys and some others of the earlier writers seem to have 

 been little interested in this branch of the subject, and often included 

 in their synonymy admittedly earlier names than those they habitu, 

 ally used, with no consideration of the claims of priority, as in the 

 case of the two species described by Pallas, of which one was accepted 



Proceedings u. S. National Museum, Vol. 57— No. 2314. 



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