LIST OP CONTRIBUTORS. 23 



Conklin, Edwin G. Continued. 



The embryology of Fulgur: a study of the influence of yolk 



on development. P '07. 320 



Karyokinesis and cytokinesis in the maturation, fertilization 



and cleavage of Crepidula and other Gasteropoda. J XII, 5 

 — Organization and cell lineage of the ascidian egg. J XIII, 5 



Conrad, Solomon W. Remarks on the Osmunda claytoniana of 

 Linnaeus, with a drawing, .i vi, 8 



Description of a new species of J uncus. J vi, 102 



Notice of a mineral which approaches to the bildstein of 



Werner; with a few remarks on the connexion of bildstein with 

 feldspar. .1 vi, 102 



Notice of a new species of Corallorhiza. J vi, 145 



Conrad. Timothy Abbott. On the geology and organic remains 

 of a part of the peninsula of Maryland. J vi, 205 



Description of fifteen new species of recent and three of 



fossil shells, chiefly from the coast of the United States. J vi, 256 

 ■ Observations on the Tertiary and more recent formations of 



a portion of the Southern States. J vii, 116 



— Description of new Tertiary fossils from the Southern States. 

 J vii, 130 



— Description of a new genus of fresh water shells. J vii, 178 



— Description of a new species of Hinnita. 3 vii, 182 



— Descriptions of new marine shells from Upper California. 



J vii, 227 



— Description of three new species of Unio from the rivers of 

 the United States. J viii. 178 



— Description of 24 new species of fossil shells, chiefly from 



the Tertiary deposits of Calvert Cliffs, Maryland, j viii, 183 



— Observations on the Silurian and Devonian systems of the 

 United States, and descriptions of organic remains. J viii, 228 



— Descriptions of new species of organic remains belonging to 



the Silurian, Devonian, and Carboniferous systems of the United 

 States. J viii, 235 



— Descriptions of three new species of Unio. P '41, 19 



— Descriptions of twenty-six new species of fossil shells. 

 P '41, 28 



— On the identity of the middle Cretaceous formation of the 



United States with the Faxoe Limestone of Europe. P '42, 143 

 — Observations on the Silurian and Devonian systems of the 

 United States, with descriptions of new organic remains. P 

 '42, 142 



