Evenings at the microscope, or Researches among the minuter organs and forms of animal life

abdomen Acineta acontia angle animal animalcules antennae appearance basal beautiful body bottom bristles calcareous cavity cells centre chitine cilia ciliary cilium close cnida colour colourless compound eyes contraction cornea creature Crustacea crystalline lens curious curved delicate diameter dilated discern disk edge eggs elegant examine extremity filaments flesh fluid front glass globules hairs head hooks horny inch inclosed insects interior jaws joints knob labium layer length lengthened lens lines live-box look mandibles margin Medusa membrane microscope minute motion mouth nacre observation organs orifice otolithes oval ovipositor pair palpi placed plates polypes portion proboscis projecting protruded resemblance ridge round rows scales seen sheath shell side skin slender species specimen Spiders spines spinnerets spiracles spiral structure substance surface teeth tentacles terminal thick thin thread tiny tion tissues transparent transverse tube upper vesicles vitreous humour Vorticella walls whole wings Zoea