Heredity and sex . Fig. 10. — Squid : Two upper right-hand figures illustrate two methodsof copulation. Lower right-hand figure dissected to show spermatophoreplaced in mantle cavity of female. Left-hand figure (below), spermatophorepocket behind mouth of male; upper figure, section of same. (After Drew.) There are a few cases where the transfer from themale to the female is brought about in a different most striking cases are those of the squids andoctopi, and of the spiders. In the squid, the male and female interlock arms(Fig. 10). The male takes the packets of sperm (thatare emitte
Heredity and sex . Fig. 10. — Squid : Two upper right-hand figures illustrate two methodsof copulation. Lower right-hand figure dissected to show spermatophoreplaced in mantle cavity of female. Left-hand figure (below), spermatophorepocket behind mouth of male; upper figure, section of same. (After Drew.) There are a few cases where the transfer from themale to the female is brought about in a different most striking cases are those of the squids andoctopi, and of the spiders. In the squid, the male and female interlock arms(Fig. 10). The male takes the packets of sperm (thatare emitted at this time from the sperm-duct) by meansof a special arm, and transfers the packets either to a THE EVOLUTION OF SEX 25 special receptacle within the circle of arms of the female,or plants them within the mantle chamber itself of thefemale. Each packet of spermatozoa is contained in along tube. On coming in contact with sea water thetube everts at one end, and allows the sperm to
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectsex, bookyear1913
