The American Naturalist, Volume 6Essex Institute, 1872 |
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Página 2
... base my statement , beyond what is suggested in the few words preceding , namely , that there is a correlation between the gradation of animals in the complication of their structure , their order of succession in geological times ...
... base my statement , beyond what is suggested in the few words preceding , namely , that there is a correlation between the gradation of animals in the complication of their structure , their order of succession in geological times ...
Página 16
... base of the pectoral fins ; the scaly portion of the body above ends in a semi- circular edge covering the space between the upper ends of the opercula . The skin covering the middle region of the head is smooth , but on either side is ...
... base of the pectoral fins ; the scaly portion of the body above ends in a semi- circular edge covering the space between the upper ends of the opercula . The skin covering the middle region of the head is smooth , but on either side is ...
Página 66
... base of the mountains , is five thousand , one hun- dred and five feet . Thus it will be seen that the traveller along this route is ascending a rapidly - inclined grade which to the eye appears as a dead - level . From this elevated ...
... base of the mountains , is five thousand , one hun- dred and five feet . Thus it will be seen that the traveller along this route is ascending a rapidly - inclined grade which to the eye appears as a dead - level . From this elevated ...
Página 70
... base sul- phurets , and the silver itself appears under the forms of sulphu- ret and antimonial . Black Hawk and Central City are the main sites of gold mining , while Georgetown is the focus of silver mining . The annual product in the ...
... base sul- phurets , and the silver itself appears under the forms of sulphu- ret and antimonial . Black Hawk and Central City are the main sites of gold mining , while Georgetown is the focus of silver mining . The annual product in the ...
Página 131
... base ( the youngest portion ) no trace or hint of stomata . A very little higher up we find the epidermis appearing as in fig . 1 , many of the cells hav- ing built a partition across their front end cutting off about a quarter of the ...
... base ( the youngest portion ) no trace or hint of stomata . A very little higher up we find the epidermis appearing as in fig . 1 , many of the cells hav- ing built a partition across their front end cutting off about a quarter of the ...
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28 | |
28 | |
62 | |
65 | |
103 | |
124 | |
129 | |
436 | |
441 | |
449 | |
472 | |
493 | |
500 | |
513 | |
528 | |
136 | |
144 | |
160 | |
184 | |
192 | |
193 | |
205 | |
234 | |
242 | |
263 | |
275 | |
281 | |
293 | |
306 | |
317 | |
321 | |
330 | |
362 | |
368 | |
385 | |
404 | |
419 | |
545 | |
563 | |
570 | |
577 | |
607 | |
636 | |
640 | |
641 | |
658 | |
671 | |
690 | |
721 | |
734 | |
740 | |
747 | |
765 | |
767 | |
769 | |
775 | |
784 | |
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Palavras e frases frequentes
abundant allied Amblyopsis AMER American angular aperture animal appear arrowheads Asa Gray base birds blind fish bones Botany cave cells character collection color common coral Cretaceous crustaceans described Devonian diameter edge eggs Elliott Coues elytra epidermis eyes fact fauna feet female figured flowers fossil genera genus geology give glacial glass habits head hundred inches Indian insects interesting islands jasper Journal known Lake larva larvæ leaves length lens less male Mammoth Cave Mass ment microscope miles mountains Natural History NATURALIST nearly nest North noticed O. C. Marsh object observed obtained ornithology pamph paper peculiar Plains plants plate portion prairies present probably Prof region remarks represented River rocks says scientific seems seen side South sparrow species specimens stomata stone streams surface tail tion trees valley vegetation wings Wyandotte Cave Zoology