84 A NATURALIST ON THE " CHALLENGER." 



Two lizards occur in the islands, which are South American 

 in their affinities.* One, Thysanodoxtylus bilineatus, is one of 

 the Iguanidce. The genus is distinguished by a scaly projection 

 on the outer side of the hinder toes. The species occurs also in 

 South America. We did not meet with this lizard, which was 

 obtained in the island by the officers of H.M.S. " Chanticleer." 



The other lizard, Euprepes pundatus, belongs to the Scin- 

 cidce. The species is peculiar to Fernando do Norhona, its 

 nearest ally, E. maculatus, inhabiting Demerara. This lizard 

 is very abundant on the main island, and especially so on 

 St. Michael's Mount, where it is remarkably tame. Some 

 specimens are more than a foot in length. I did not see the 

 Gecko mentioned by Webster. 



I could find no fern on any of the islands, nor any moss 

 or Liver-wort. These may, however, no doubt occur on the 

 moister parts of the main island. Fernando do Norhona is in 

 its fauna and flora closely allied to South America. It has 

 however, a peculiar species of fig and a peculiar lizard. Possibly 

 amongst the three land birds noted, other than the dove, peculiar 

 species may occur, but it seems unlikely that it will hereafter 

 yield either in fauna or flora any very remarkable endemic 

 forms. The seaweeds of the island are found by Professor 

 Dickie to be related chiefly to those of the Mexican Gulf. 



Accounts of Fernando do Norhona are to be found in "Webster's 

 narrative of Capt. Foster's voyage. " Voyage of the Chanticleer." London, 

 1834. See also Appendix for Webster's notes on the Geology and Natural 

 History of the Island. 



Darwin's "Journal of Researches," p. 11. 



Darwin's " Volcanic Islands," p. 23. 



" Report and Charts of the U.S. brig 'Dolphin,'" edited by Lieut. 

 S. P. Leet "Washington, 1845, p. 75. 



Snow's "Voyage to Tierra del Fuego and the South Seas." London, 

 Longmans, 1857, p. 32. 



* Gray, "British Museum Catalogue of Lizards," p. 193. 



