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from annotation p.97 gives reference to German Palaeontologists who have shown impossibility of separating Ammonites into species.— Now if the exuberance of forms had occurred in only some one sea or at only one time we might easily have had not record — with occasionally a few forms emigrating & spreading. good resume of Wurtenberger &c
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from annotation p152 case of apparent convergence of character in Sponges (higher organism)
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from annotation p174 causes why no two groups or stems of polyps are exactly alike.
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from annotation p214 Ammonites (like Hyatt) first changing in external conditions