The Doctrine of Evolution Its Data Its Principles Its Speculations And Its T
The Doctrine of Evolution Its Data Its Principles Its Speculations And Its T
Winchell, Alexander, 1824-1891
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204-206). 3. Besides the predominance of crustaceans in the Primor- dial Fauna, a similar predominance is noticed in the numbers of molluscs compared with the still lower classes. In the first phase the sj)ecies of molluscs are to those of the lower classes as 44 to 14; in the second phase, as 34 to 5. A similar though less marked predominance appears on a comparison of genera. When we thus consider that the relative development of trilobites and molluscs underwent a gradual diminution, to give... place to lower forms, we recognize the fact that it pre- sents an order diametrically opjjosed to that which ought to be observed according to the theories (p. 20Tj. n. Absence of Foramtnifera and Scarcity of Protozoa IN General. Foraminifera are those animals of extremely simple organi- zation to which belong Eozoon (as supposed), Amceba^ Niimmu- liteSj and similar forms. These are protozoans, a group which also embraces sponges — horny or calcareous — together with numerous other simple forms of no interest here.
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