INDEX. 



Schiedeana, 261. 



sphserica, 264. 



tetrancistra, 262. 



Wrightii, 262. 

 Subgen. Coryphantha, 264. 



calcarata, 267. 



compacta, 266. 



conoidea, 268. 



cornifera, 267. 



dasyacantha, 268. 



Echinus, 267. 



macromeris, 270. 



Nuttallii, 264. 



papyracantha, 264. 



pectinata, 266. 



Pottsii, 268. 



radiosa, 269. 



recurvispina, 266. 



robustispina, 265. 



Scheerii, 265. 



scolymoides, 267. 



similis, 265. 



strobiliformis, 267, 268. 



sulcata, 267. 



tuberculosa, 268. 



vivipara, 269. 

 Subgen. Anhalonium, 270. 



fissurata, 270. 

 Marsh gas, on the disappearance of, 85. 

 Mastodon, internal structure of cranium, 25. 

 Mastodon, the lower jaw of, 68. 

 Medal, presented by the Jussieu family, 205. 

 Meetings, Annual, 1, 37, 130, 194, 256. 

 Melloni, Macedoine, decease of, 164. 

 Members, Honorary. 



Argelander, F. W. A., 205. 

 Boeckh, August, 42. 

 Bopp, Franz, 205. 

 Brodie, Benjamin, 205. 

 VOL. III. 52 



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