ADDENDA. (US 



fait connaitre que les piiiges des Nouvelles-Shetland sont couvcrtes de 

 grands blocs erratiqiies formes de granite, et par consequent d'une nature 

 differente des autres roches du paj's. M. James Eights, naturaliste de 

 Pexpedition, n'hesite pas a considerer ces blocs comme ayant ete apportes 

 par les glaces, qui viennent annuellement s'echouer et se fondre sur les 

 plages dont il s'agit et comme ctant les indices de terres inconnues sitiiees 

 plus prfes du pole que la terre la Trinite." I have not been able to tind 

 any account of this expedition. Lieutenant Kendall describes fGeograjik. 

 Journal, 1830^' pinnacles of syenite in Smith's Island, one of the South 

 Shetland group; so that the inferences regarding tlie distances, from which 

 the blocks are supposed to have come, probably are erroneous. 



In speaking (p. 272) of the rigour of the climate of Deception Island 

 in South Shetland, I might have mentioned that Lieut. Kendall says 

 (Geograi^h. Journal, 1830, p. 66), that on March the 8th, " We took the 

 hint of the freezing over of the cove (lat. 62° 55') and effected our retreat." 

 This is the same as if, in the northern hemisphere, the harbour of 

 Cliristiansund in Norway, were to fi-eeze on the 8th of September ! 



Page 285. 



I have described the dimensions of the great glacier which in 

 lat. 46° 50', sends down an arm to Kelly Harbour, and another to a flat 

 swamp ; I now find from information communicated to me by Captain 

 FitzRoy, that it must communicate with the channels and bays north- 

 ward, which extend behind the peninsula of Tres Montes. Agueros, in 

 giving an account of an expedition of the missionaries (Descripcion Huto- 

 rial de la Provincia de Chiloe, p. 227), says, they encountered in the La- 

 guna de San Rafael (lat. 46° 33' to 46° 48') " many icebergs (muchos 

 farallones de nievej, some great, some small, and others middle sized." 

 This was on the 22d of November, 1778. Captain FitzRoy also tells me, 

 that in the account of another missionary voyage, it is said that the boats 

 had difficulty, on account of the islands of ice, in passing through the Cano 

 de Perdon, a strait connecting the Lagiina de San Rafael, with the other 

 bays behind Tres iVIontes. Transposing in imagination, as I have done 

 at p. 291, the places in the southern hemisphere to corresponding ones in 

 Europe, these facts are the same as if, in a cliannel of the sea stretching 

 from the Mediterranean between the Alps and the Jura, a boat should 

 encounter in the latitude of the lake of Geneva, and on the 22rf of June, (but 

 not on one occasion only,) so many icebergs, and of such dimensions, that 

 the historian of the voyage should describe them as being " some great, 

 some small, and otiiers middle sized" ! 



Having insisted so strongly, in this part of my Journal, that it is in die 

 southern hemisphere, where tropical forms encroach on the temperate 



