The evolution theory . 168 THE EVOLUTION THEORY larva of* the Sacculinae bores its way into the inside of a crab orhermit-crab, at the same time losing its limbs, segmentation, and itschitinous covering; and within the body of its host it is transformedinto the sac-like organism we have already described. After a time itemerges again on the surface, and remains attached to the abdomen ofits host (Fig. 112, C. Sacc), drawing its nourishment from the bloodwhich it sucks up by means of its numerous delicate roots (W, W). From all this we may conclude that certain Cirrhipedes in timeslong past ado
The evolution theory . 168 THE EVOLUTION THEORY larva of* the Sacculinae bores its way into the inside of a crab orhermit-crab, at the same time losing its limbs, segmentation, and itschitinous covering; and within the body of its host it is transformedinto the sac-like organism we have already described. After a time itemerges again on the surface, and remains attached to the abdomen ofits host (Fig. 112, C. Sacc), drawing its nourishment from the bloodwhich it sucks up by means of its numerous delicate roots (W, W). From all this we may conclude that certain Cirrhipedes in timeslong past adopted a parasitic habit in the Cypris-larva stage, and thatthey gradually underwent adaptations to this mode of life, and thatthese went further and further, until the animal was transformed.
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Keywords: ., bookauthorthomsonj, bookcentury1900, bookdecade1900, bookyear1904
