. Il bollettino biologico. Biologia; Zoologia; biologia; biologia marina. GAMETIC MEIOSI IN MONOCYSTIS. 389 danno la chiara foto del contenuto del nucleare. Il numero totale di gameti formata sia da gamonts in questa specie è di circa 130 e il numero di sporoblasts è approxi- valgono 65. Il protoplasma è uniformemente alveolare, chiaro e con alveoli di dimensioni medie. Il nucleo del gamont è di forma sferica e contiene un singolo endosoma sferica.. FJG. 2. Primo pregametic mandrino con 10 cromosomi in uno gamont; la porzione di nucleo di disintegrazione nell'altro. Sezione. Camera lucida. X
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GAMETIC MEIOSIS IN MONOCYSTIS. 389 give the clearest pictures of the nuclear contents. The total number of gametes formed by both gamonts in this species is approximately 130 and the number of sporoblasts is approxi- mately 65. The protoplasm is uniformly alveolar, clear, and with alveoli of medium size. The nucleus of the gamont is spherical and contains a single spherical endosome.. FJG. 2. First pregametic spindle with 10 chromosomes in one gamont; portion of disintegrating nucleus in the other. Section. Camera lucida. X 2650. The material was fixed in hot Schaudinn's fluid consisting of a saturated solution of bichloride of mercury in absolute alcohol without and with 5 per cent, of glacial acetic acid. Seminal vesicles were removed entire from richly infected earthworms and immersed after puncturing, in the killing fluid where they were left for from two to four hours. They were then treated for twenty-four hours with iodized alcohol, embedded in paraffine and cut in sections from three to four microns thick. The sections were stained with iron haematoxylin without or with a counter stain. Other stains were tried but the best results were obtained with iron haematoxylin. The metamorphosis of the gamont nucleus begins with the condensation of the chromatin and formation of the chromosomes. At this stage the latter are feebly staining and even in the metaphase of the first division they do not stain with the same intensity as in the later progamous divisions or as they do in the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield,
