X ( '(III I <' II I*. 



BY I, oils ELSBERU 



The Structure of Colored Blood-corpuscles, (Art. XXV) 265 



BY HEKMAX L. FAIRCHILD. 



( )n llir Structure of Lepidodendron and Sigillaria 41 



No. 1 ; On the Variations of the Decorticated Leaf-scars of cer- 

 tain Sigillarise, < Art. Ill' 42 



No. 2 ; The Variations of the Leaf-scars of Lepidodendron aculeatum, 



Sternberg, (Art. VII) 77 



No. 3; The Identity of certain Supposed Species of Sigillaria with 

 S. lepidodendrifolia, Brongt. , (Art. XIL 129 



BY EDWARD J. HABLOC'K. 



Index to the Literature of Titanium, 1783—1876 : (Art. VI). 



Part First, General Literature 53 



Part Second, Minerals 65 



BY DAVID S. JORDAN. 



On the Distribution of Fresh-water Fishes of the United States, (Art. 



VIII) D2 



BY ALEXIS A. JULIEN. 



Ou Spodumene and its Alterations, (Art. XXVII) 318 



BY GEORGE X. LAWRENCE. 



Descriptions of New Species of Birds from Dominica', (Art. IV N 4l 



Descriptions of New Species of Birds of the Families Trochilida; 



and Tetraoniike, (Art. V) 50 



1 Ascription of a New Species of Parrot, of the genus Chrysolis, (Art. X) 125 

 Descriptions of New Species of Birds from St. Vincent, W. 1., (Art. 



XIV) 146 



Descriptions of New Species of Birds from Grenada and Dominica, 



YV. I.. (Art. XVI) 160 



Description of a New Species of Cypselidse, of the Genus Chcetura, 



(Ail. XXID 255 



