CONTENTS. 



PAGE. 



Haniman Alaska Expedition.— XX. Nemerteans ; by Wesley 

 R. Coe . . I 



Mammals collected by Dr. W. L. Abbott on the Natuna Islands ; 

 by Gerrit S. Miller, Jr., m 



Branner Agassiz Expedition to Brazil. — V. MoUusks from the 

 Vicinity of Pernambuco ; by W. H. Dall 139 



New birds of the families Tanagridae and Icteridae ; by Robert 



Ridgway i49 



Harriman Alaska Expedition.— XXI. Hydroids ; by C. C. Nutting 157 



Harriman Alaska Expedition.— XXII. Odonata ; by R. P. Currie 217 



Harriman Alaska Expedition. — XXIII. Ascidians ; by W. E. 

 Ritter 225 



A new species of Olenellus from the lower Cambrian of York Co., 

 Penn. ; by Atreus Wanner 267 



Synopsis of the Rice Rats (genus Oryzomys) of the United .States 

 and Mexico ; by C. Hart Merriam 273 



Harriman Alaska Expedition.— XXIV. The Willows ; by F. 

 V. Coville -297 



Hopkins Stanford Galapagos Expedition.— I. Hemiptera ; by OttO 

 Heidemann 363 



Hopkins Stanford Galapagos Expedition. — II. Diptera ; by D. 

 W. Coquillett 37^ 



Hopkins Stanford Galapagos Expedition. — III. Odonata ; by R. 

 P. Currie 3S1 



Harriman Alaska Expedition. — XXV. Algae ; by De Alton 

 Saunders 391 



Hopkins Stanford Galapagos Expedition. — IV. Orthoptera ; by 



Jerome McNeill 4S7 



Synonomy of the Fish Skeleton ; by Edwin Chapin Starks . 507 



Hopkins Stanford Galapagos Expedition. — V. Thysanura and 

 Termitidae ; by Nathan Banks 541 



Descriptions of 23 new Harvest Mice ; by C. Hart Merriam . 547 



