62 REPOET OF NATIONAL MUSEUM, 1913. 



The curator of the division, Dr. William H. Dall, commenced work 

 on a revision of the marine moUusks of the North Pacific coast, 

 beginning with the Nuculacea and Biiccinidse, while the assistant 

 curator, Dr. Paul Bartsch, continued liis studies of the mollusks of 

 South Africa and the Philippine Islands, in which good progress was 

 made. Mr. John B. Henderson spent much time at the division 

 pursuing his mvestigations of the AntUlean moUusk fauna, and the 

 collections were consulted by the Hon. T. H. Aldrich, of Bhmingham, 

 Ala.; Miss Julia Gardner, of Johns Hopkins University; and Mr. 

 L. S. Frierson, of Frierson, La. 



Marine invertebrates. — The principal accessions received by this 

 division came, as usual, from the Bureau of Fisheries, and consisted 

 chiefly of material that had been worked up and reported upon by spe- 

 ciahsts. Of schizopod crustaceans collected on the Albatross cruises of 

 1899-1900 and 1904-1905 in the Pacific Ocean under the direction of 

 Alexander Agassiz, and described by Dr. H. J. Hansen m the Memoirs 

 of the Museum of Comparative Zoologj^, there were about 2,500 

 specimens, representing 63 species, of which 8 were new to science 

 and 2 had been made the types of new genera. Of echinoids or sea 

 urchins from several Pacific explorations of the Albatross, described 

 by Dr. Hubert Lyman Clark in the same Memoks, there were some 

 1,300 specimens, representing 52 species of which 14 were new. Of 

 echinoderms other than crinoids obtained during a cruise of the 

 steamer Albatross to the west coast of Mexico in 1911 under the 

 direction of Dr. C. H. Townsend, and also described by Dr. H. L. 

 Clark in a report not yet published, there were 986 specimens, repre- 

 senting 104 species, of which 7 were new. Of simple ascidians 

 from the collections made by the Fish Commission on the Atlantic 

 coast of the United States between 1871 and 1887, described by Dr. 

 W. G. Van Name in the Proceedmgs of the Boston Society of Natural 

 History, there were about 250 specimens, representing 34 species, of 

 which 8 were new. About 900 samples of plankton and 348 micro- 

 scopic slides of foraminifera were also received from tho Bureau of 

 Fisheries. Mr. Harry K. Harring, of Washington, presented 139 

 species of rotifera, of which 5 were new, mounted on microscopic 

 slides, this important contribution more than doubling the repre- 

 sentation of this order of minute worms in the Museum collection. 

 From the Museum d'Histoire Naturelle at Paris, France, 9 species 

 of shrimps of the family Atyidse new to the Museum and mcluding 

 cotypes of 3 new species described by Prof. E. L. Bouvier, were 

 obtained by exchange. 



The work of improving the condition of the reserve collections of 

 the division and making them more accessible for reference was satis- 

 factorily continued, the alcoholic specimens of echinoids, asteroids, 

 holothurians, alcyonarians and actinians being overhauled, the nomen- 



