The embryology and metamorphosis of the Macroura . nts heremarked 7h, k are described as cells which have originated from the endoderm, audcompleted their metamorphosis into ordinary mesoderm cells. These may be com-pared directly with b, Fuj. 18, and s, s^, Fig. 21, from the egg-nauplius of Alpheussaulcyi, and are rather to be regarded as nuclear bodies in the earlier stages ofretrogressive metamorphosis. x256. Fig. 21. Part of transverse section through the foregut of the egg-nauplius oi Alpheus saulcyi, toshow the degenerative cell products. x610. « REFERENCE LETTERS. A. T. S., altered food
The embryology and metamorphosis of the Macroura . nts heremarked 7h, k are described as cells which have originated from the endoderm, audcompleted their metamorphosis into ordinary mesoderm cells. These may be com-pared directly with b, Fuj. 18, and s, s^, Fig. 21, from the egg-nauplius of Alpheussaulcyi, and are rather to be regarded as nuclear bodies in the earlier stages ofretrogressive metamorphosis. x256. Fig. 21. Part of transverse section through the foregut of the egg-nauplius oi Alpheus saulcyi, toshow the degenerative cell products. x610. « REFERENCE LETTERS. A. T. S., altered , chitioous egg membranes,ec, ectoblast. »., nuclear body, with vesicular chromatin , i, Ij m, m-3, nuclear products in , mesoblast. N., NJ, nuclei of eutoblastic , nucleolus of entoblascio cell (not clearly shown).01., oil drop. Bet., protoplasmic , 8, e^., degenerative , cleavage , , yolk vacuole,r., yolk. ¥. P., yolk S., yolk sphere. Plate XXVII. V Fig. 18. ?9 S W ?
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Keywords: ., bookauthor, bookcentury1800, bookdecade1890, booksubjectcrustacea
