CHAPTER I. The Senses in the Lower Animals

THE SENSES IN THE LOWER ANIMALS

The sense of touch--The senses of taste and smell--Actinophryans having taste--The sense of sight--Modification of sight organs by surroundings --Sight in Actinophryans--Blind fish sensitive to light--Blind spiders --Blind man--Primitive eyes in Cymothoe--In the jelly-fish, sea-urchin, Alciope, Myrianida--The sight organs of the snail--Power of vision in the snail--Eyes of crayfish--Compound eyes--Vision in "whirligig beetle"--In Periophthalmus--In Onchidium--In Calotis--Organs of audition--In Lepidoptera--Hymenoptera--Orthoptera--Diptera --Hemiptera--Dyticus marginalis--Corydalus--Ears of grasshopper and cricket--Of the "red-legged locust"--Of flies--Of gnats--Auditory vesicles of horse-fly--Ears of butterflies--Cerambyx beetle--Long-horned beetle--Cicindelidae--Carabidae. 7