144 Transactions of the Society. 



shows the spores enclosed within its cells ; in other cases, however, 

 the meagreness ot the morphological characters available for the 

 distinction of fossil Bacteria, leaves us in some doubt as to the 

 value of the results attained. 



Eenault's work further extended to the investigation of Tertiary 

 floras. The remarkable stained wax casts which he obtained of 

 fossil flowers and fruits from the travertine of Sezanne, are an 

 interesting feature of the Museum Collections. 



His reputation, however, will always rest mainly on his study 

 of the higher Palaeozoic plants by the anatomical method, a line of 

 work the full value of which has only begun to be recognised by 

 botanists within the last few years. 



As investigators, Eenault and his distinguished English rival 

 Williamson had much in common, not only in their like enthusiasm 

 and devotion to their work, but also in a certain obstinacy when 

 confronted with the opinions of others, combined with complete 

 honesty and openness of mind in accepting the results brought 

 home to them by their own observations. 



Eeferences. 



Only a few of Eenault's most important works, and those 

 specially cited, are given. A very full bibliography, with a re'sume' 

 of many of his works by Eenault himself, and selected illustra- 

 tions, will be found in M. Eoche's " Biographie," cited below. 



Renault, 1868. Sur un petiole de Fougere fossile du terrain houiller supe- 

 rieur d'Autun, YAnachoropteris pulchra. Arm. Sci. Nat. 

 Bot., ser. 5, ix. (published in 1869). 



„ 1869. Sur quelques vegetaux silicifies dAutun. Etude de la tige 

 et des petioles des Zygopteris, etc. Ann. Sci. Nat. Bot., 

 ser. 5, xii. (publ. in 1871). 



„ 1870. Sur l'organisation de rameaux silicifies appartenant a un 

 Sphenophyllum. Description de la tige des Spheno- 

 phyllum. Comptes Eendus, lxx. p. 1158. 



„ 1873. Recherches sur lorganisation des Sphenophyllum et des 

 Annularia. Ann. Sci. Nat Bot., ser. 5, xviii. 



„ 1874. Etude du genre Myelopteris et du Sigillaria spinulosa (the 

 latter in conjunction with GrandEury). Eecueil des 

 savants etrangers. Acad. Sci., lxxviii. p. 870. 



„ 1875. Recherches sur les vegetaux silicifies d'Autun et de St. 

 Etienne. Etude du genre Botryopteris. Ann. Sci. Nat. 

 Bot., ser. 6, i. 



„ 1876. (1) Recherches sur la fructification de quelques vegetaux pro- 

 venant des gisements silicifies dAutun et de St. Etienne 

 (Zygopteris, etc.). Ann. Sci. Nat. Bot., ser. 6, iii. 



„ „ (2) Recherches sur la vegetaux silicifies d'Autun et de St. 



Etienne. Nouvelles recherches sur la structure des 

 Sphenophyllum et sur leurs affinities botaniques. Ann. 

 Sci. Nat. Bot., ser. 6, iv. 



„ 1879. Structure comparee de quelques tiges de la Flore car- 

 bonifere. Nouvelles archives du Museum, ii., 2 e serie. 



