Livres associés

On the so-called Dimorphism in the Genus Cambarus.

Observations on the Astacidae in the United States National Museum and in the Museum of Comparative Zoology with descriptions of new species.

Notes on North American Crayfishes, family Astacidae.

Monograph of the North American Astacid�.

• Variation and correlation in the crayfish with special reference to the influence of differentiation and homology of parts.
  Auteur(s): Pearl, Raymond
• Poisonous properties of the whorled milkweeds Asclepias pumila and A. verticillata var. geyeri.
  Auteur(s): Marsh, Charles Dwight ,  Clawson, Arthur Brooks
• Modes of research in genetics.
  Auteur(s): Pearl, Raymond

• The water-relation between plant and soil
  Auteur(s): Livingston, Burton Edward ,  Hawkins, Lon Adrian
• The venom of Heloderma
  Auteur(s): Loeb, Leo
• Studies on the germ cells of aphids.
  Auteur(s): Stevens, Nettie Maria