16 
85. The foundations of the Origin of species, a sketch written 
18 Edited by. his son, Francis Darwin. [With a 
i 9 
86. The foundations of the Origin of species. Two essays 
written in 1842 and 1844. Edited by his son, Francis 
Darwin. [With a portrait.] xxx, 263 p. Cambridge, 
1909. 
Papers contributed by Charles Darwin to periodical literatur 
Proceedings of the Geological Society of ae (1836-1842) : 
87. Geological notes made during a survey of the east and west 
coasts of South America in the years 1832, 1833, 1834, 
and 1835, with an account of a transverse section of the 
Cordilleras of the Andes between Valparaiso and Men- 
a c. Geol. Soc. Lond. 2: 210-212. 1836 
Credited to ‘‘ F."" Darwin, but the error corrected in the volume-index. 
88. Observations of proofs of recent elevation on the coast of 
ili, made during the survey of His Majesty’s ship 
Beagle, commanded by Capt. Fitzroy, R.N. Proc. 
eol. Soc. Lond. 2: 446-449. 1837. 
89. A sketch of the deposits waren extinct Mammalia in 
the coe one of the Plata. Proc. Geol. Soc. Lond. 
542-544. 1838. 
go. a. certain areas of elevation and subsidence in the Pacific 
and Indian oceans, as deduced from the study of coral 
formations. Proc. Geol. Soc. Lond. 2: 552-554. 1838. 
gi. On the formation of mould. Proc. Geol. Soc. Lond. 2 
1838 
92, On the connexion of certain volcanic phaenomena, and on 
the formation of mountain-chains and volcanos, as the 
effects of continental elevations. Proc. Geol. Soc. Lond. 
2: 654-660. 1838. 
Cf. no. ror. 
93. On the distribution of the erratic boulders, and on the con- 
temporaneous unstratified deposits of South America. 
Proc. Geol. Soc. Lond. 3: 425-430. 184: 
Cf. no. 102 
