The embryology and metamorphosis of the Macroura . J^JJ X(Fi^.9.) /^ //? /ferrcc/c, del^. SactiftWiiM^ftipHi^a INvTok ALPHEUS AND PONTONIA. 520 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. Plate XXIX. Fig. 31. Part of section of egg of Bahaman variety of Alphetis heterochelis, showing two yolkpyramids. Same stage as Fig. 15. Sixty-four cells present, x -iTi. Fig. 32. Part of transverse section of egg-nauplius of A. saulcyi, showing the fold of one of theantennsE and the mesoblastic cells and degenerative products contained within Fig. 33. Wandering cells in yolk above the same embryo,
The embryology and metamorphosis of the Macroura . J^JJ X(Fi^.9.) /^ //? /ferrcc/c, del^. SactiftWiiM^ftipHi^a INvTok ALPHEUS AND PONTONIA. 520 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. Plate XXIX. Fig. 31. Part of section of egg of Bahaman variety of Alphetis heterochelis, showing two yolkpyramids. Same stage as Fig. 15. Sixty-four cells present, x -iTi. Fig. 32. Part of transverse section of egg-nauplius of A. saulcyi, showing the fold of one of theantennsE and the mesoblastic cells and degenerative products contained within Fig. 33. Wandering cells in yolk above the same embryo, showing protoplasmic union. xClO. Fig. 34. Part of section of egg of the Bahaman heterochelis in egg-nauplius stage, showing wander-ing cells, which have left the yolk and have attached themselves to the superficialectoblast. The nuclei are flattened against the surface, but are clearly distinguishedfrom the epiblast. x 610. Pig. 35. Part of transverse section of older embryo, showing blood cells and wandering mesoblastcell (Jlies.). Eye-pigme
Size: 1569px × 1592px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectcrustacea
