﻿CONTENTS. 



PART I. MAY, 1855. 



ART. I. — Notice of Producti found in the Western States and Territories, with descriptions of 

 twelve New Species. By J. C. Norwood and Henry Pratten, of the Illinois Geological 

 Survey, 1 ........... 5 



ART. II. — Notice of the genus Chonetes, as found in the Western States and Territories, with 

 descriptions of eleven New Species. By Joseph G. Norwood and Henry Pratten, of the 

 Illinois Geological Survey, 2 ..... .23 



ART. III. — Contributions to South American Ilerpetology. By Edward Hallowell, M. D., . 33 



ART. IV. — Plantge Ileermannianoe. Descriptions of New Plants, collected in South California by 

 Dr. A. L. Heermann, Naturalist attached to the Survey of the Pacific Railroad route, under 

 Lieut. R. S. Williamson, U. S. A. With remarks on other Plants heretofore described and 

 belonging to the same collection. By E. JJurand and Theod. C Hilgard, M. D., . 37 



ART. V. — An account of several species of Fish observed in Florida, Geoigia, &c. By John 



Edward Holbrook, M. D., Professor of Anatomy, &c, Charleston, S. C, . . . 47 



ART. VI. — Besearches on the Cryptogarnic Flora of the State of Georgia. By Prof. Julien Deby, 59 



ART. VII. — Descriptions of NeT Species of Birds of the Genus Spermestes, Swainson, in the 



Museum of the Academy of Natural Sciences of Philadelphia. By Johu Cassiu, . . 69 



PART II. DECEMBER, 1855. 



ART. VIII. — Notice of Fossils from the Carboniferous Scries of the Western States, belonging 

 to the genera Spirifer, Bellerophon, Pleurotomaria, IMacrocheilus, Natica, and Loxonema, 

 with descriptions of eight new characteristic species. By Joseph G. Norwood and Henry 

 Pratten, of the Illinois Geological Survey, 4 ..... .71 



ART. IX. — Plantse Prattenianae Californicse : An enumeration of a collection of California Plants, 

 made in the vicinity of Nevada, by Henry Pratten, Esq., of New Harmony ; with critical 

 notices and descriptions of such of them as are new, or yet unpublished in America. By 

 Elias Durand, 5 .......... 79 



ART. X.— Relation of Atomic Heat to Crystalline Form. By J. Aitken Meigs, M. D , 6 . 105 



ART. XI. — Contributions towards a knowledge of the Marine Invertebrate Fauna, of the Coas'sof 



Rhode Island and New Jersey. By Joseph Leidy, M. D.,' .... 135 



ART. XEI. — Descriptions of New Species of Psittacidae, in the collection of the Academy of Natu- 

 ral Sciences of Philadelphia. By John Cassin, 8 . . . . . .153 



1 Extra copies printed for the Author, 



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3 li 



4 11 

 6 It 



6 II 



7 II 



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August, 1854. 

 August, 1854. 

 November, 1854. 

 July, 1855. 

 August, 1855. 

 October, 1855. 

 November, 1855. 

 November, 1855. 



