396 INDEX. 



D. 



De Beaumont's theory of the elevation of mountain chains, 355. 

 Decease of Fellows, Associate Fellows, and Foreign Honorary Mem- 

 bers, 39, 40, 61, 131, 163, 164, 195, 224, 256, 347. 

 Diclido carpus, 48. 

 Dighton rock, the removing of, 322. 

 Donation, 26, 168. 

 Drayfonia, 49. 

 DuRKEE, Silas. On Culex pipiens, 168. 



E. 



I 



Ear, on the voluntary motion of, in man, 355. 



Echinocactus, 271. 



bicolor, 277. 

 brevi-hamatus, 271. 

 cylindraceus, 275. 

 Emoryi, 275. 

 flexispinus, 273. 

 hamatocanthus, 273. 

 hamatus, 272. 

 horizonthalonius, 276. 

 ingens, 275. 

 intertextus, 277. 

 Lecontei, 274. 

 Lindheimeri, 276. 

 longehamatus, 273. 

 Muhlenpfordtii, 272. 

 Parryi, 276. 

 pectinatus, 279. 

 polyancistrus, 272. 

 polycephalus, 276. 

 Scheerii, 271. 

 setispinus, 272. 

 sinuatus, 273. 

 Texensis, 276. 

 Treculianus, 273. 

 uncinatus, 272. 



