. The transformations (or metamorphoses) of insects (Insecta, Myriapoda, Arachnida, and Crustacea) : being an adaptation, for English readers, of M. Émile Blanchard's "Metamorphoses, moeurs et instincts des insects;" and a compilation from the works of Newport, Charles Darwin, Spence Bate, Fritz Müller, Packard, Lubbock, Stainton, and others. ijiiijiiPiWiiiiiiiI life iiiiihi iiw ^ m ,i.^.iii>iiiiiiiiiii THE HOMARUS MARINUS. 457 seven pairs of legs, which are furnished with an oar-Hke branch onthe third joint. The abdomen has six segments only, and noappendages ; and the tail or telson
. The transformations (or metamorphoses) of insects (Insecta, Myriapoda, Arachnida, and Crustacea) : being an adaptation, for English readers, of M. Émile Blanchard's "Metamorphoses, moeurs et instincts des insects;" and a compilation from the works of Newport, Charles Darwin, Spence Bate, Fritz Müller, Packard, Lubbock, Stainton, and others. ijiiijiiPiWiiiiiiiI life iiiiihi iiw ^ m ,i.^.iii>iiiiiiiiiii THE HOMARUS MARINUS. 457 seven pairs of legs, which are furnished with an oar-Hke branch onthe third joint. The abdomen has six segments only, and noappendages ; and the tail or telson is flat and pointed, with astrong projecting central spine. In Fig. 3 M. Gerbe shows thatthe resemblance to the adult has become greater, but the greatantennae, rostrum, and chelate extremities, and the appendagesof the abdomen, are not yet YOUNG LOBSTERS. I. Embryo in the egg. 2. Zoea just born. 3. After the first moult. Let us examine Fritz Miillers description of the metamorphosesof a prawn, which is a stalk-eyed Crustacean, and closely allied tothe lobster (from W. S. Dallass admirable translation of Facts forDarwin ). The young of the genus Pencus quit the ^ totallyunlike the adults, and the extent of the metamorphosis is as greatas in any of the true Insccta. The youngest forms have, whenthey quit the o.^^, an ovate body without any segments; they havea solitary frontal eye, and three pairs of swimming feet, of which 458 TRANSFORMATIONS OF INSECTS. the anterior are simple, and the other two branched (biramose).These Nauplii have no carapace, no paired eyes, no masticatingorgans, and the mouth is over-arched by a helmet-hke hood. This rudimentary larva or Naiiplius soon alters in shape, moults,and a fold of skin grows across the back behind the third pair offeet, and four pairs of stout processes (rudiments of ne
Size: 1709px × 1462px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjec, booksubjectcrustacea
