 B 0* ~ i i 3 o i 3 an adolescent condition. Similar comparisons may be made in the other genera. Progressively through each series, the adult structure of any genus forms the last immature stage of the next higher, until the highest member in its ontogeny...  The Primary Factors of Organic Evolution - Page 180by Edward Drinker Cope - 1904 - 547 pagesFull view - About this book
 | 1895 - 644 pages
...higher genera), the gwyniform and cist ell if or ni stages are larval, and the platidiform represents an adolescent condition. Similar comparisons may be...larval and immature stages of the simpler genera. Conclusions. It is impossible, with present knowledge, to go deeply into the chronological history... | |
 | 1893 - 1266 pages
...the higher genera), the gwyniform and cistelliform stages are larval, and the platidiform represents an adolescent condition. Similar comparisons may be...genera. It is evident that in the identification of species belonging to the Terebratellidse, whether recent or fossil, the strict specific characters... | |
 | Newton Horace Winchell - 1893 - 476 pages
...evidences of senility and reversion presented during the old age of the higher genera." (p. 388.) " Progressively through each series, the adult structure...represents serially, in its stages of growth, all the adult structurée, with the larval and immature stages of the simpler genera.'' (p. 386.) The genera of the... | |
 | Edward Drinker Cope - 1896 - 602 pages
...|iiiB c/i terebratalifo Dallina gwyniform cistelliform platidiform ismeniform mQhlfeldtifo c 3 3 STAGES an adolescent condition. Similar comparisons may be...in the identification of specimens belonging to the Terebratellidse, whether recent or fossil, the strict specific characters must be given first consideration.... | |
 | Charles Emerson Beecher - 1901 - 674 pages
...I 3 .9 1 | S 1 1 i 1 1 * 1 form and cistelliform stages are larval, and the platidiform represents an adolescent condition. Similar comparisons may be...larval and immature stages of the simpler genera. Conclusions. It is impossible, with present knowledge, to go deeply into the chronological history... | |
 | Edward Drinker Cope - 1904 - 582 pages
...B. H 3 .ynlll .y.ll n 90 O o V) £? o n V H O n M en H > a S en H o n 0) en H > o B STAGE VI s o n u an adolescent condition. Similar comparisons may be...Terebratellidae, whether recent or fossil, the strict specif1c characters must be given first consideration. Species, therefore, must be based upon surface... | |
 | Newton Horace Winchell - 1893 - 474 pages
...evidences of semlity and reversion presented during the old age of the higher genera." (p. 388.) " Progressively through each series, the adult structure...larval and immature stages of the simpler genera.'' (p. 386.) The genera of the family Terebratellidx are arranged by the author as follows: l> vi ii ,i... | |
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