LIST OP CONTRIBUTORS. 71 



Heilprin, Angelo. Continued. 



■ A comparison of the Eocene Mollusea of the southeastern 



United States and western Europe, in relation to the determina- 

 tion of identical forms. P '79, 217 



On the strati graphical evidence afforded by the Tertiary 



fossils of the peninsula of Maryland. P '80, 20 

 — On some new Lower Eocene Mollusea from Clark Co., Ala- 



bama, with some points as to the strati graphical position of the 

 beds containing them. P '80, 364 



— • Notes on the Tertiary geology of the southern United States. 

 P '81, 151 



A revision of the Cis-Mississippi Tertiary pectens of the 



United States. P '81, 416 



— Remarks on the molluscan genera Hippagus, Vertieordia, and 

 Pecehiolia. P '81, 423 



— Note on the approximate position of the Eocene deposits of 



Maryland. P '81, 444 



— A revision of the Tertiary species of Area of the eastern 

 and southern United States. P '81, 448 



— On the occurrence of ammonites in deposits of Tertiary age. 



P '82, 94 



— On the relative ages and classification of the Post-Eocene Ter- 

 tiary deposits of the Atlantic slope. P '82, 150 



— On the occurrence of nummulitic deposits in Florida, and the 



association of nummulites with a fresh-water fauna. P '82, 189 



— On the age of the Tejon rocks of California and the occur- 

 rence of ammonitic remains in Tertiary deposits. P '82, 196 



— On the value of the ' ' Nearctic ' ' as one of the primary zoologi- 



cal regions. P '82, 316 



— The ice of the glacial period. P '83, 46 



— Phenomena of glaciation. P '83, 69 



— The synchronism of geological formations. P '83, 197 



— Note on a collection of fossils from the Hamilton (Devonian) 

 group of Pike Co., Pa, P '83, 213 



— On the value of the "Nearctic" as one of the primary zoologi- 



cal regions. Replies to criticisms by Mr. Alfred Russel Wallace 

 and Prof. Theodore Gill. P '83, 266 



— On a carboniferous ammonite from Texas. P '84. 53 



— Antiquity of implement-making man. P '84, 220 



— On a remarkable exposure of columnar trap near Orange, 

 New Jersey. P '84, 318 



