vi CONTENTS 



15. Riley, J. H. Three remarkable new species of birds from Santo 



Domingo. December i, 1916. 2 pp. (Pub. no^. 2435.) 



16. VON NiESSL, G. The determination of meteor-orbits in the solar 



system. (Authorized translation by Cleveland Abbe.) April 

 23,1917- 35 PP- (Pub. no. 2436.) 



17. Explorations and field-work of the Smithsonian Institution in 



1916. April 26, 1917. 134 pp. (Pub. no. 2438.) 



18. Gilbert, C. H. On the occurrence of Benthodesmus Atlanticus 



Goode and Bean on the coast of British Columbia. February 

 21, 191 7. 2 pp. (Pub. no. 2439.) 



