ARTICLES 
The Structure of Wing Feathers. E. Mascua. (PLATES I-XVI.) 
Mawes 7s. steaplished WMay,.6; L905... ie 2' een ole pe ees I 
The Tarpon and Lady Fish* and their Relatives. THEODORE GILL. 
(PLatTEs xvui-xx1.) No. 1576. Published May 13, 1905.. 31 
Diagnosis of a New Genus and Species of Fossil Sea Lion from the 
Miocene of Oregon. FREDERICK W. TruE. No. 1577. Pub- 
Pete Wha 145, TOOR 202 2) nt Manet po eioe a rip oir sat Sere sie alates 47 
Diatoms, the Jewels of the Plant World. AtBert MANN. (PLATES 
eati-xxy.y No. 1578. Published May 23, 1905.......... 50 
Notes on the Nomenclature of Certain Genera of Birds. THarry 
C. OBERHOLSER. No. 1579. Published May 13, 1905...... 59 
The Bibliography of Halley's Comet. E. F. McPixe. No. 1580. 
eee ME FOP EGUS vo eons vr ce dn vy aie eee «Uke et ors 69 
The Ancestral Origin of the North American Unionide, or Fresh- 
Water Mussels. Cuartes A. WHITE. (PLATES XXVI—XXXI.) 
Biehnente  Eplished: | WME. TO, TOOK sc. cae aagers coer + eee ies eyahe 75 
Brain Weight in Vertebrates. Aes Hrpiticxa.” No. 1582. Pub- 
Reem TO. MOG: Ait cs lecenc eo 3 et, ve atch wes soe ae Sitiale » 89 
ores, “(PLATES XxXxII, xxx.) “No. 1583. (Smithson “Mor- 
emer ICUS ue, ole tiess feed «a ~ cjuas MRRIOR oy en Sart donne 113 
The Diplomatic Service of the United States, with some Hints to- 
ward its’ Reform. ANDREW D. Wuite. No. 1586. Published 
Dire EUR IV Phe on «2 ao vd ska 0 320s what aie tie LOK ee ee 117 
The History of the Whale Shark Rhinodon typicus Smith. Barton 
A. BEAN. (PLATES XXXIV-xxxvi.) No. 1587. Published July 
2 DOES ene cla: Ue pea ae RA Mee SON! emir edi area 139 
The Avian Genus Bleda Bonaparte and some of its Allies. Harry 
C1Oeernorser (No. 1588. . Published July 1; 1905.......«.' 149. 
Scaphoceros tyrelli, an extinct Ruminant from the Klondike Gravels. 
WILFRED H. Oscoop. (PLATES xxxviI-xLi.) No. 1589. Pub- 
Rpm CHEE 030.5 oo, win wind wialar a’ don poareumeaniye sist gs ns “es Ones 073 
A new Genus and several new Species of Landshells Collected im 
Central Mexico by Doctor Edward Palmer. Witt1aM HEALEY 
Parr, .) (PrAres \ xiiii—xiiv.): No. 1590... Published) July \ 1, 
TOS AS Vo ee Mel neiAb mart bees mitre ar 187 
The Family of Cyprinids and the Carp as its Type. THEODORE 
GILL. (PLATES xLv-Lyi1u.) No. 1591. Published September 
SM ee eee al val sh aia Tas, wine: ae unl Soaynichy een cee eine ao = 195 
The International Catalogue of Scientific Literature. Cyrus ADLER. 
Noetne2. Published September 8, 1905... 22... a a 219 
Vv 
