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Show ( 48 ) No. of species. Bordeaux and Dax• 594, of which 136 are still living, and 458 extinct. Touraine Turin Vienna Baden Angers Ronca 298 68 97 17 124 " 35 99 26 166 ,, 25 40 " 3 1418 " " 230 , 80 89 73 141 37 No of specie~. C ommon to Bol·deaux· • Dax, Tour. aine ib. iiJ. Turm ib. ib. Vienna ib. ib. Baden ib. ib. Angers ib. ib. Honea iiJ. ib. Touraine and Turin ib. ib. Touraine and Vienna ib. ib. Touraine and Baden ib. ib. Touraine and Angers ib. ib. Touraine and Ronca ib. ib. Touraine, Turin and Vienna ib. ib. Touraine, Turin and Angers ib. ib. Touraine, Vienna and Angers ib. ib. Turin and Vienna ib. ib. Turin and Ronca ib. ib. Baden and Angers Touraine and Angers · Touraine and Turin Touraine and Vienna Touraine and Baden Turin and Ronca Vienna and Angers AnO'ers and Ronca · To~raine, Vienna and Baden . . . • . y ~naers and Baden • · Tourame, Ienna, ~ o. T : Vienna and Angers Bordeaux, Dax, Tourame, m~n, . dB .I n l.h . 1'h • l'b • Turm , VIenna an aue 'b ib. Vienna antl Baden · iibb.. ~b: ib. Vienna, Angers and Baden "' There are at Bordeaux and at Dax Carried over 4.!6 species 473 62 18 23 13 8 0 12 17 4 14 8 2 7 6 10 15 2 2 2 14 2 256 making a total of • t • th 9tlw9o localities there are, in but from the great number o f. spec·l es co.m mon o e reality, only 594 species, as above mentwnetl. 49 No. of Spt>cles Brought over • • • • 256 Common to Bor~eaux, Dax, Touraine, Turin, Vienna, Angers & Baden 1 ~b. ib. ib. Angers and Baden , 2 1b, ib. Vienna and Baden • 4 263 By a~ding to the above 134 species which are common to the M1ocene, and the two other epochs 134 the total number of analogues will be found to be 397 By subtracting frJm the total number of species of the above localities . • • • . • • 1418 those species which are common to different localities 397 We find the real number of species of this epoch to be 1021 The number of living analogues is 176, which is in the proportion of rather less than 18 in l 00; the number of fossil analogues, after subtracting those which pass from the Miocene into both the Pliocene and Eocene epochs, is 168, which is very nearly in the same proportion. The species which pass from the Miocene into the Pliocene period are in number 196, of which 114 are living, and 82 fossil, which is very nearly in the proportion of 20 in 100 of the total number of species of the latter epoch. Thus it is remarkable that there are 18 in 100 living analogues, 18 in 100 C>f analogous fossil species, and that 20 in 100 of these species pass from the Miocene to the Pliocene epoch. The 114 living species, and the 82 fossil ones, which are common to the Miocene and Pliocene periods, are distributed, in the last·mentioned epoch, in the following manner:- LIVING. FossiL. Crag 4 Italy 48 Sicily 5 Sicily and Italy 4 6 Sicily, Italy, and the Crag 11 Crag 4 Sicily 1 Italy 71 Sicily and Italy . 5 Sicily and the Crag 1 114 82 The preceding distribution of species will show t11at Italy is represented in the Miocene period by 181 species, Sicily by 69, and the Crag by 20. EOCENE PERIOD. Paris, London, Valognes, Belgium, Castelgomberto, and Pauliac. A smaU number of species only have been examined from Belgium, Pauliac, and Castelgomberto, but which agreed, with few exceptions, with species of the Paris basin. So also in regard to V alognes. VOL, lti, d |