id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
chapter_009		chapter_009			.txt	text/plain	10054	257	44	This group includes the large majority of existing species. In a memoir on Fossil Sessile Cirripedes, I have stated that, from the {305} number of existing and extinct tertiary species; from the extraordinary abundance of the individuals of many species all over the world, from the Arctic regions to the equator, inhabiting various zones of depths from the upper tidal limits to 50 fathoms; from the perfect manner in which specimens are preserved in the oldest tertiary beds; from the ease with which even a fragment of a valve can be recognised; from all these circumstances, I inferred that had sessile cirripedes existed during the secondary periods, they would certainly have been preserved and discovered; and as not one species had then been discovered in beds of this age, I concluded that this great group had been suddenly developed at the commencement of the tertiary series.	cache/chapter_009.txt	txt/chapter_009.txt
