. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . ^^ O. .-_. Fig. 160. 1—3, 5—10, Vauclieria sessiUs (Vauch.) DC. 1, young sexual organs; 2, partiallyripe antheridium ; 3, transverse section of same ; 5, almost ripe sexual organs ; 6, the sameat the moment of fertilization ; 7, longitudinal section through a young oogonium, in whichthere are many nuclei; 8, older oogonium cut off from the filament by a wall, with only onenucleus (ek); 9, fertilized egg; 10, ripe zygote (oospore) and decayed
. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . ^^ O. .-_. Fig. 160. 1—3, 5—10, Vauclieria sessiUs (Vauch.) DC. 1, young sexual organs; 2, partiallyripe antheridium ; 3, transverse section of same ; 5, almost ripe sexual organs ; 6, the sameat the moment of fertilization ; 7, longitudinal section through a young oogonium, in whichthere are many nuclei; 8, older oogonium cut off from the filament by a wall, with only onenucleus (ek); 9, fertilized egg; 10, ripe zygote (oospore) and decayed , antherozoids of V. st/nandra Woron. a, antheridium ; eh, nucleus of oosphere (egg-cell);A, nuclei; o, oogonium; oe, oil drops; pi, plasma-secretion from the oogonium; sk, nucleiof spermatozoids (antherozoids); sp, spermatozoids (antherozoids). (After Oltmanns.) cases turned to one side, either towards the antheridium or away from protoplasm of the oogonium contains much oil, numerous chloroplasts,and, after the appearance of its basal wall, only one nucleus. There is onlya single oosphere or egg-cell which in most species of Vaucher
Size: 1879px × 1330px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambridgeengtheuni
