. The testimony of the rocks; . , and thespecies of all the other genera at six more, — forty-onespecies in all; and as the flowering plants of the country donot fall short of fourteen hundred species, the ferns bear tothem the rather small proportion of about one to thirty-five ; whereas of the British Coal Measure flora, in whichwe do not yet reckon quite three hmidred species of plants,about a hundred and twenty were ferns. Three seventhsof the entire carboniferous flora of Britain belonged to thisfamihar class; and for about fifty species more we can dis-cover no nearer analogies than thos
. The testimony of the rocks; . , and thespecies of all the other genera at six more, — forty-onespecies in all; and as the flowering plants of the country donot fall short of fourteen hundred species, the ferns bear tothem the rather small proportion of about one to thirty-five ; whereas of the British Coal Measure flora, in whichwe do not yet reckon quite three hmidred species of plants,about a hundred and twenty were ferns. Three seventhsof the entire carboniferous flora of Britain belonged to thisfamihar class; and for about fifty species more we can dis-cover no nearer analogies than those which connect themwith the fern allies. And if with the British Coal Measure 58 THE PAL^ONTOLOGICAL we include those also of the Continent of America, we shallfind the proportions in favor of the ferns still greater. Thenumber of carboniferous plants hitherto described amounts,says M. Ad. Brogniart, to about five hundred, and of thesetwo hundred and fifty, — one half of the whole, — wereferns. Fig. 14. Fig. 15. Fig. Fig. 17. Fig. 18. Fig. 19.
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