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He didn't have time to finish off the class Crustacea through an examination of its stomatopods, amphipods, homopods, isopods, trilobites, branchiopods, ostracods, and entomostraceans.
"But do tell Daisy, will you, doctor," said Preston, "that it is a subject she cannot understand yet. She wants me to bring her books about trilobites." "Time hangs heavy, Daisy?" said the doctor. "No, sir only when I have nothing to do." "What have you done to-day?" "Nothing, sir; except talking to papa and mamma, and some business about a little girl."
"But do tell Daisy, will you, doctor," said Preston, "that it is a subject she cannot understand yet. She wants me to bring her books about trilobites." "Time hangs heavy, Daisy?" said the doctor. "No, sir only when I have nothing to do." "What have you done to-day?" "Nothing, sir; except talking to papa and mamma, and some business about a little girl."
Let the trilobite alone, and let's have Grimm's Tales to-morrow shall we? or what will you have?" Daisy was patiently silent a minute; and then in came Dr. Sandford. In his presence Preston was mute; attending to the doctor's manipulations as gravely as the doctor himself performed them. In the midst of the general stillness, Dr. Sandford asked, "Who was speaking about trilobites as I came up?"
The rapidity with which ideas grow old in our memories is in a direct ratio to the squares of their importance. Their apparent age runs up miraculously, like the value of diamonds, as they increase in magnitude. A great calamity, for instance, is as old as the trilobites an hour after it has happened.
There were a great many of them, the doctor said, and many different species; for great numbers of them are found to this day in those particular rocks. The rocks must have been made at the time when the trilobites lived, and have somehow shut them in. And the doctor thought it likely that at the time when they lived, there was no dry land in existence, but all covered by the sea.
They consisted chiefly of trilobites of genera distinct from those occurring in the overlying Silurian formations.
When we reflect on the hundreds of Mollusks, Echinoderms, Trilobites, Corals, and other fossils already obtained from more ancient Silurian formations, Upper, Middle, and Lower, we may well ask whether any set of fossiliferous rocks newer in the series were ever studied with equal diligence, and over so vast an area, without yielding a single ichthyolite.
Professor Phillips has remarked that in some slaty rocks the form of the outline of fossil shells and trilobites has been much changed by distortion, which has taken place in a longitudinal, transverse, or oblique direction.
The most interesting geological objects in our New England that I can think of are the great boulders and the scratched and smoothed surface of the rocks; the fossil footprints in the valley of the Connecticut; the trilobites found at Quincy.
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