Text-book of comparative anatomy . FIG. 276.—Nauplius Stage. Stage F. md, Mid-gut, the endodenn cells have assimilatednutritive yolk; pr, proctodaeum (hind-gut); A, anus; TA, thoraco-abdominal rudiment; m,mesoderm ; st, beginning of invagination of the stomodseum ; ec, FIG. 277.—Stage G. en, The endodermal cells laden with yolk ; h, rudiment of heart; pr,proctodseum ; ks, germ zone ; A, anus ; m, mesoderm ; ?, upper lip ; st, stomodffium ; ec, ectoderm.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative