INDEX. 339 



Caligus, gracilis, D., 56. 

 productus, D., 56. 

 Thymni, D., 56. 

 Calistes, gen., Dana, 57. 



Trigonis, D., 57. 

 Gandace, gen., Dana, 5, 22. 



aucta, D., 24. 



curta, D., 23. 



£^Aioj9tca, D.,23. 



ornata, D., 23. 



pachydactyla, D., 23. 



truncata, D., 24. 

 Catopia, gen., 10, 25. 



furcata, D., 25. 

 Cecropince, Dana, 54. 

 Cells, forming entire animals, 236. 

 Cetacea, fossil, of United States, 4. 

 Chagres, longitude of, 162. . 



Channing, W. F. Electrical phenomena during the aurora of Sep- 

 tember 29th, 283. On tornadoes, 290. On the electric fire tele- 

 graph, 299. 

 Charcoal, low point of ignition, 256. 

 Chart, old, of the mounds at Marietta, 220. 

 Cladocera, 47. 

 Clio, planet, 257. 

 Clydonia, gen., Dana, 219. 

 gracilis, D., 219. 

 longipes, D.,219. 

 Coast Marks, 111, 123, 184, 221, 225. 

 Coast Survey, Report on, 124. 

 Coats that form on lead, 92. 



Cochituate water, its action on lead pipes, 65, 75, 79, 99- 

 Coloration of animals, 234. 

 Comet, discovery of a new, 110. 

 Comet, Encke's, 138. 

 Comet, Petersen's second, 140, 147. 

 Comet of Mauvais, 1. 

 Comet of April and May, 1849, 149, 158. 

 Comets, parts of our solar system, 147. 



