NOTES. CXXX1 



lava, and were, therefore, simultaneously active. (Compare Dana, p. 184, 188, 

 193, and 196.) 



( 514 ) p. 377. Wilkes, p. 114, 140, and 157; Dana, p. 221. On account 

 of the perpetual confusion between r and 1, Mouna Loa is often written Mouna 

 Koa, and Kilauea Kirauea. 



( 515 ) p. 377. Dana, p. 25 and 138. 



( 516 ) p. 378. Dana, Geology of the U. S. Explor. Exped. p. 138. (Com- 

 pare Darwin, 'Structure of Coral Reefs, p. 60.) 



( 517 ) p. 379. Loop, de Buch, Description phys. des lies Canaries, 1836, 

 p. 393 and 403405. 



( 518 ) p. 380. Dana, Geol. of the U. S. Expl. Exp. p. 438446; and on 

 the fresh traces of former volcanic activity in New Holland, p. 453 and 457; 

 and on the numerous basaltic columns in New South Wales and Van Diemen 

 Island, p. 495510; and P. E. de Strzelecki, Phys. Descr. of New South 

 Wales, p. 112. 



( 519 ) p. 381. Ernest Dieffenbach, Travels in New Zealand, 1843, vol. i. 

 p. 337, 355, and 401. Dieffenbach calls White Island: " a smoking solfatara, 

 but still in volcanic activity " (p. 358 and 407), and on the map it is stated to 

 be " in continual ignition." 



( 52 ) p. 381. Dana, p. 445448; Dieffenbach, vol. i. p. 331, 339341, 

 and 397. On Mount Egmont, see vol. i. p. 131 157. 



( 521 ) p. 382. Darwin, Volcanic Islands, p. 125; Dana, p. 140. 



( 522 ) p. 382. L. de Buch, Descr. des lies Canaries, p. 365. We find, 

 in the above-named three islands, together with plutonic and sedimentary beds, 

 phonolites and basaltic rocks ; but these may have appeared at the first upheaval 

 of the island from the bottom of the sea to above the surface of the waters. No 

 traces either of fiery eruptions within historic times, or of extinct craters, appear 

 to have been found. 



( M3 ) p. 383. Dana, p. 343350. 



( 524 ) p. 383. Dana, p. 312, 318, 320, 323. 



( 523 ) p. 383. L. von Buch, p. 383; Darwin, Volcanic Islands, p. 25; Dar- 

 win, Coral Reefs, p. 138; Dana, p. 286 305, and 364. 



( 5S6 ) p. 385. Dana, p. 137. 



( 527 ) p. 585. Darwin, Vole. Isl. p. 104, 110112, and 114. If Darwin 

 says so decidedly that trachytes are entirely wanting in the Galapagos, it is 

 because he restricts the term trachyte to common felspar, i. e. orthoclase, or to 

 orthoclase and sanidine (glassy felspar). The curious inbaked or embedded 

 pieces in the lava of the small and entirely basaltic crater of James Island con- 

 tain no quartz, although they appear to rest on a plutonic rock. (Compare, in 



i-2 



