. The crayfish : an introduction to the study of zoology . Crayfish. Fig. bS.—Astacm fluviatilis.—S\iTface views of the earlier stages in the development of the embryo, from the appearance of the blastopore (A) to the assumption of the nauplius form (F) (after Reichenbach, x about 23). hp, blastopore ; c, carapace; fg, fore-gut Involution ; h, heart; lig, hind-gut involution; lb, labrum; mg, medullary groove; o, optic pit; p, endodermal plug partly filling up the blastopore ; pc, pro- cephalic processes ; to, abdominal elevation; S, antennules ; S, antennai U, man- Please note that th

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. The crayfish : an introduction to the study of zoology . Crayfish. Fig. bS.—Astacm fluviatilis.—S\iTface views of the earlier stages in the development of the embryo, from the appearance of the blastopore (A) to the assumption of the nauplius form (F) (after Reichenbach, x about 23). hp, blastopore ; c, carapace; fg, fore-gut Involution ; h, heart; lig, hind-gut involution; lb, labrum; mg, medullary groove; o, optic pit; p, endodermal plug partly filling up the blastopore ; pc, pro- cephalic processes ; to, abdominal elevation; S, antennules ; S, antennai U, man- 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 Huxley, Thomas Henry, 1825-1895. London : Kegan Paul, Trench, Tru?bner & Co.

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Keywords: ., bookauthorhuxleyth, bookcentury1900, bookdecade1900, bookyear1906