REPORT OF NATIONAL, MUSEUM, 1923. 49 



shells. After Mr. Henderson's death, Doctor Clapp gave these 

 specimens (about 3,000) to the Museum, thus making our collection 

 of this group the most complete in the world. The marine shells, 

 about 190 species and 1,000 specimens, donated by D, Thaanum, 

 Honolulu, H. I., besides containing a number of types, (28), are 

 from localities from which we have heretofore had no specimens in 

 the collection. Several collections of moUusks from the Philippine 

 Islands have been received from various sources, namely. Dr. C F. 

 Baker, Los Bafios, P. I.; Gilbert S. Perez, Lucena, Luzon, P. I., 

 including the type of one new species; Maxwell Smith, Plartsdale, 

 N. Y., whose gift included G types of new forms. The collection of 

 shipworms has also been enriched by numerous gifts. Thus the 

 Committee on Marine Piling Investigations sent in 20 accessions 

 of shipworms and rock-boring mollusks, from the Atlantic and 

 Gulf coasts of the United States, Cuba, and Porto Rico; J. W. 

 Gonggryp, Haag, Holland, presented 18 lots from South America 

 and the West Indies; Science and Agriculture Department, British 

 Guiana, (through L. D. Clear, jr.) 3 shipworms from British 

 Guiana ; C. Walton, Peterhead, South Australia, 8 shipworms includ- 

 ing the type of a new subgenus, Nototeredo^ from Australia ; James 

 Zetek, Ancon, C. Z., about 12 specimens from Panama; George P. 

 Denison, Honolulu, H. I., a collection of rock-boring mollusks from 

 Pearl Island, Hawaii ; Museum of Comparative Zoolog}^, Cambridge, 

 Mass. (through Dr. William E. Clapp), a piece of wood containing 

 shipworms from Port Bolivar, Tex. ; while Doctor Bartsch added a 

 collection of shipworms collected by himself at Woods Hole, Mass 

 He also collected about 15,000 land, fresh water and marine mollusks 

 in the West Indies. Prof. T. D. A. Cockerell, University of Colo- 

 rado, generously donated a number of species collected by himself 

 in the Madeira Islands, including the types of 3 new species and 

 subspecies. Dr. Bryant Walker presented some mollusks from 

 Alabama, including one cotype, and G. Willett, Craig, Alaska, 

 others from Alaska, including the type of a new species. Hon. 

 Gifford Pinchot, Milford, Pa., donated 90 specimens of landshells 

 from Hawaii, and Dr. F. Felippone, Montevideo, miscellaneous 

 mollusks from Uruguay. Through exchange with the Zoological 

 Survey of India, Calcutta, 22 landshells from India were obtained. 



The Section of Helminthological Collections received as a gift 

 from Prof. Edwin Linton, University of Georgia, 75 microscopic 

 slides and 2 vials of cestode parasites of sharks and skates, including 

 the types of 9 new species. 



Echinoderms. — The gift of 50 recent crinoids from the north 

 Atlantic region, mostly from the Ingolf expedition, 1895-96, was 

 received from the Zoological Museum of the University, Copenhagen 

 (through Dr. Th. Mortensen). The type specimen of one of his 



