 | Geological Survey (U.S.) - 1887 - 602 Seiten
...that there existed among these ancient forms no ordinal distinctions, such as obtain today, bur t ha t they formed a single homogeneous group of generalized...existing families of insects, we find upon sufficient examinât ion some fundamental structural features separating them as a whole from those of later times,... | |
 | Henry Alleyne Nicholson, Richard Lydekker - 1889 - 916 Seiten
...homogeneous group of generalised Hexapods," which this eminent authority has named Palceodictyoptera, and which " should be separated from later types more...orders than by any definite peculiarities of its own." With the exception of a few forms from the Trias of North America, which are allied to the Cockroaches,... | |
 | Sir Norman Lockyer - 1891 - 894 Seiten
...Permian Eugerton. This order is defined more by the generalized characters of its various members, and the lack of those special characteristics which are...orders, than by any definite peculiarities of its own. One of its most important features is, however, that the two pairs of wings are always closely similar... | |
 | Sir Norman Lockyer - 1891 - 790 Seiten
...generalized characters of its various members, and the lack of those special characteristics which arc the property of existing orders, than by any definite peculiarities of its own. One of its most important features is, however, that the two pairs of wings are always closely similar... | |
 | Thomas George Bonney - 1893 - 570 Seiten
...more than one existing order, but are referred by Mr. Scudder, the chief authority on this subject, to "a single homogeneous group of generalized hexapods...orders than by any definite peculiarities of its own." f Some seem like forerunners of May flies, others of cockroaches, others, again, of beetles : the wings... | |
 | John Henry Comstock - 1893 - 98 Seiten
...Scudder "there existed among these ancient forms no ordinal distinctions, such as obtain to-day, but they formed a single homogeneous group of generalized...the property of existing orders than by any definite peculiarity of its own." * To this group of generalized hexapods which includes all paleozoic insects... | |
 | Burt Green Wilder - 1893 - 580 Seiten
...Scudder "there existed among these ancient forms no ordinal distinctions, such as obtain to-day, but they formed a single homogeneous group of generalized...the property of existing orders than by any definite peculiarity of its own." * To this group of generalized hexapods which includes all paleozoic insects... | |
 | Thomas George Bonney - 1902 - 638 Seiten
...by Mr. Scudder, the chief authority on this subject, to " a single homogeneous group of generalised hexapods which should be separated from later types...existing orders than by any definite peculiarities of its own."t Some seem like forerunners of May flies, others of cockroaches, others, again, of beetles :... | |
 | Sir Norman Lockyer - 1891 - 750 Seiten
...Permian Eugereon. This order is defined more by the generalized characters of its various members, and the lack of those special characteristics which are...orders, than by any definite peculiarities of its own. One of its most important features is, however, that the two pairs of wings are always closely similar... | |
 | Sir Norman Lockyer - 1891 - 680 Seiten
...Permian Eugereon. This order is defined more by the generalized characters of its various members, and the lack of those special characteristics which are...orders, than by any definite peculiarities of its own. One of its most important features is, however, that the two pairs of wings are always closely similar... | |
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... from the existing orders under the name of Palaeodictyoptera — a term first proposed by Goldenberg in lieu of Dohrn's preoccupied Dictyoptera, which had been suggested for an order typified by the Permian Eugereon. This order is defined more by... 