LIST OF CONTRIBUTORS. 49 



Gabb, William M. Continued. 



Description of a new species of cephalopod, from the Eocene 



of Texas. P '60, 324 



Description of a new species of Oassidulus, from the Creta- 



ceous formation of Alabama. P '60, 518 



— Description of a new genus and species of amorphozoon, from 

 the Cretaceous of New Jersey. P '60, 518 



— Reply to Marcou's criticism of catalogue of Cretaceous fossils. 



P '60, 548 



— Descriptions of some new species of Tertiary fossils from 

 Chiriqui, Central America. P '60, 567 



— Synopsis of the American Cretaceous Brachiopoda. P '61, 18 



— On Gryphaaa calceola and Ostrea marshii. P '61, 21 



- — On an outcrop of the "Ridley Group" in New Jersey. P 

 '61, 124 



— List of the Mollusca inhabiting the neighborhood of Phila- 



delphia. P '61, 306 



— ■ Description of new species of Cretaceous fossils from New 

 Jersey, Alabama and Mississippi. P '61, 318 

 — Notes on Cretaceous fossils with descriptions of a few addi- 



tional new species. P '61, 363 



— Descriptions of new species of American Tertiary fossils and 

 a new Carboniferous cephalopod from Texas. P '61, 367 



— A revision of the species of Baculites described in Dr. Mor- 



ton's Synopsis of the Cretaceous Group of the United States. 



P '61, 394 



— Description of a new species of cephalopod from the coast 



of California. P '62, 483 



— On kitchen-middens near San Francisco. P '68, 182 



— On fossils from the Amazon Valley. P '68, 183 



— On copper ore in Arizona. P '68, 228 



— Notes on the genus Polorthus Gabb. P '72, 259 



— Notice of a collection of Cretaceous fossils from Chihuahua, 

 Mexico. P '72, 263 



— Description of some new genera of Mollusca. P '72, 270 



— On the Indian tribes of Costa Rica. P '75, 330 



— Genesis of Cassidaria striata Lam. P '75, 361 



— Note on Mr. Berthoud's paper. P '75, 366 



— Note on the discovery of representatives of three orders of 



fossils new to the Cretaceous formation of North America. 

 P '76, 178 



