Proceedings of the American Academy of Arts and Sciences, 20권American Academy of Arts and Sciences., 1885 |
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29 페이지
... solution of osmic acid may be used . The eggs are placed in a watch - glass with a few drops of sea - water , and then a quantity of osmic acid ( one half per cent ) equal to that of the sea - water is added . After five to ten minutes ...
... solution of osmic acid may be used . The eggs are placed in a watch - glass with a few drops of sea - water , and then a quantity of osmic acid ( one half per cent ) equal to that of the sea - water is added . After five to ten minutes ...
44 페이지
... solutions . Pronuclei . The earliest view of the pronuclei that we have ob- tained represents them as two equal spheres ( .01 mm . in diameter ) already in contact . The male pronucleus lies directly above the female , so that a line ...
... solutions . Pronuclei . The earliest view of the pronuclei that we have ob- tained represents them as two equal spheres ( .01 mm . in diameter ) already in contact . The male pronucleus lies directly above the female , so that a line ...
50 페이지
... solution . As the contrast becomes more pronounced as cleavage advances , and as it eventually ends in a decided histological differen- tiation , its appearance at this stage must be regarded as an early anticipation of events realized ...
... solution . As the contrast becomes more pronounced as cleavage advances , and as it eventually ends in a decided histological differen- tiation , its appearance at this stage must be regarded as an early anticipation of events realized ...
55 페이지
... solution , the contrast is often very much strengthened . In some of the mounted prepara- tions , the central cells are very deep brown , almost black , while the marginal cells are light yellowish brown . In most of the mounted ...
... solution , the contrast is often very much strengthened . In some of the mounted prepara- tions , the central cells are very deep brown , almost black , while the marginal cells are light yellowish brown . In most of the mounted ...
92 페이지
... solution , or by using a very weak solution of potassium hydrate . Frequently , when the animal dies in water , the cuticula becomes raised up into vesicular swellings and is thus rendered plainly visible ; when some part of the animal ...
... solution , or by using a very weak solution of potassium hydrate . Frequently , when the animal dies in water , the cuticula becomes raised up into vesicular swellings and is thus rendered plainly visible ; when some part of the animal ...
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Abdomen abdominal appendages Acad acetic acetic acid acid acute Antennæ anthracene appears areola Astacus Barrande base Bentham blastodisc blastomeres border Boston bracts branches broad California calyx Cambarus Cambridge carapace cells Cephalothorax cervical groove chela ciliate cleavage cleavage-plane collected corolla difference of potential Dikelocephalus dorsal Emmons entoderm Eritrichium faune feet flowers foliis fossils fruit genera genus glabrous Graptolites Gray gynobasi Hagen inches long lateral leaflets leaves length less limestone lines long lobes longis Magn male margin maxillipeds median Mountains nearly nuclei Nuculæ nutlets oblong observations Olenus ovum pair of legs papillæ Paradoxides pedicels periblast petioles plate Point Lévis posterior Potsdam precipitate Primordial fauna Proc pubescent punctate ring River rostrum sæpius sandstone schists second fauna segment sepals short side Silurian slates slender somites species specimens spermogonia spines stars superficial tension surface Taconic system telson third tion Trilobites tube upper ventral