The Foraminifera: An Introduction to the Study of the ProtozoaLongmans, Green and Company, 1902 - 354 páginas |
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Página 35
... perforate shell - wall . sion as the segmental buds are added to the growing shell . The stolon passages are , as may be supposed , B FIG . 21 . A , Apertures ( a ) on the septal face of Peneroplis pertusus . B , Single aperture in ...
... perforate shell - wall . sion as the segmental buds are added to the growing shell . The stolon passages are , as may be supposed , B FIG . 21 . A , Apertures ( a ) on the septal face of Peneroplis pertusus . B , Single aperture in ...
Página 36
... perforate group usually by a single opening or slit placed either on the inner or outer border of the shell in curved and coiled forms ( fig . 21 ) . The group of the Perforata , as the name sug- gests , is distinguished by having a ...
... perforate group usually by a single opening or slit placed either on the inner or outer border of the shell in curved and coiled forms ( fig . 21 ) . The group of the Perforata , as the name sug- gests , is distinguished by having a ...
Página 37
... perforate group , and these layers may be regarded as an exogenous growth . This secondary structure is found only in the higher types of foraminiferal shells , and chiefly in those which have a double sep- tum - that is , a complete ...
... perforate group , and these layers may be regarded as an exogenous growth . This secondary structure is found only in the higher types of foraminiferal shells , and chiefly in those which have a double sep- tum - that is , a complete ...
Página 78
... perforate , and the spiral manner often changes in later growth to an elongate straight series . The sub - genus Ardacina forms a link with genera having a eyelical arrangement of chambers by showing a tendency towards that plan of ...
... perforate , and the spiral manner often changes in later growth to an elongate straight series . The sub - genus Ardacina forms a link with genera having a eyelical arrangement of chambers by showing a tendency towards that plan of ...
Página 135
... perforate . There is also a tendency for the internal shell structure to become cancellated , or broken up into a rudely cellular structure , but not to so great a degree as in the next sub - family of the LOFTUSIINE . The ENDOTHYRINE ...
... perforate . There is also a tendency for the internal shell structure to become cancellated , or broken up into a rudely cellular structure , but not to so great a degree as in the next sub - family of the LOFTUSIINE . The ENDOTHYRINE ...
Otras ediciones - Ver todas
The Foraminifera: An Introduction to the Study of the Protozoa Frederick Chapman Vista completa - 1902 |
The Foraminifera: An Introduction to the Study of the Protozoa Frederick Chapman Sin vista previa disponible - 2015 |
The Foraminifera: An Introduction to the Study of the Protozoa (Classic Reprint) Frederick Chapman Sin vista previa disponible - 2015 |
Términos y frases comunes
abundance adherent Alveolina Ammodiscus aperture Aptian arenaceous arranged balsam beds Brady calcareous Canada balsam Carboniferous Chalk chamberlets chambers chitinous Clay complanate coral Cretaceous to Recent Cristellaria Crown 8vo Cycloclypeus D'Orbigny D'Orbigny sp deposits depths dimorphism dredgings Eocene example EXAMPLE.-C fathoms Forami Foraminifera foraminiferal fauna fossil Funafuti Fusulina Gault genera genus Geol glauconitic Globigerina ooze Goës Greensand Gromia growth Haplophragmium hyaline Illustrations Journ Jurassic Lagena limestone London Clay Lower Cretaceous Mém Micr Miliolina Miocene nautiloid Nodosaria Nubecularia Nummulites Oligocene Orbitoides Orbitolites Parker and Jones pelagic perforate Plate 12 Plate 9 Pliocene porcellanous pseudopodia Reuss Rotalia sand sarcode segments septal face septate shallow water shell-structure shell-wall Sitzungsb sometimes species specimens spicules spiral stolon strata structure Sub-family surface Tertiary Textularia thin tion triserial tube types Upper usually whilst whorl Wien Wiss
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