INDEX TO VOL. III. 



N. B. — New genera and species are in Italics. 



A. 



Academy, manuscript pamphlets referring to early meetings of the, 

 349. 



Acicahjptus., 127. 



Acids, Fatty, on the oleic acid series of, 349. 



Agassiz, Louis. Diversity of origin of human race, 7. On the 

 Allantois, 15. On organic tissues, 21. Cyprinodonts, 42. On 

 cell-segmentation, 46. On cartilaginous fishes, 63. Cestracion, 65. 

 New red sandstone, 69. Phenomena accompanying the first ap- 

 pearance of a circulating system, 166. Classification of Polyps, 

 187. Classification in Zoology, 221. Orthagoriscus Mola, 319. 

 The glanis of Aristotle, 325. On the general characters of orders 

 in the classification of the Animal Kingdom, 346. On the death of 

 Francis C. Gray, 347. On the correspondence of different stages 

 of embryonic development with the different stages of geological 

 succession, 353. On De Beaumont's theory, 355. The order to 

 which Ammonites belong, 356. The family of Naiades, 378. 



Ages of trees, as known from their rings, 335. 



Allantois, on the formation and function of the, 12. 



Alsia, 184. 



Calif ornica, 185. 



Aluminum, 127, 221, 255. 



Amaroria, 51. 



Ammonites, to which order of the Cephalopoda do they belong ? 356. 



Anhalonium, 270. 



Anorthoscope, 162. 



Aphides, researches on the development of, 55. 



Arago, Francois, decease of, 62. 



