. A manual of zoology. Zoology. Fig. 5.—Sifcdon pisci/onnis l,lar\"Li of A mhlv^^lonia tigritnuu) l^alLcr Dunit'ril and lUl)roii). develops farther and assumes a shapeless form, so that there arises a vcr)'- remarkable sexual dimorphism (iig. 8). All these examples, which can be multiplied by hundreds, can be explained in the same way. The higher. Fig. Aiiilhci-rs jHrcanii::. ,/, iiauiilius-, /., cyclops-stage; i, aduU female (after Claus). forms pass through the stage of the lower, because they spring from an- cestors which were more or less similar to the latter. Man in his em- bryo

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. A manual of zoology. Zoology. Fig. 5.—Sifcdon pisci/onnis l,lar\"Li of A mhlv^^lonia tigritnuu) l^alLcr Dunit'ril and lUl)roii). develops farther and assumes a shapeless form, so that there arises a vcr)'- remarkable sexual dimorphism (iig. 8). All these examples, which can be multiplied by hundreds, can be explained in the same way. The higher. Fig. Aiiilhci-rs jHrcanii::. ,/, iiauiilius-, /., cyclops-stage; i, aduU female (after Claus). forms pass through the stage of the lower, because they spring from an- cestors which were more or less similar to the latter. Man in his em- bryological de^-elopment passes through the lish stage, the frog the perennibranchiate stage, the parasitic crustacean first the nauplius-. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912