The luminous organs which occur in a few insects, belonging to widely different families, and which are situated in different parts of the body, offer, under our present state of ignorance, a difficulty almost exactly parallel with that of the electric organs.
Familia oso diferenteetako intsektu gutxi batzuk gorputzaren alde ezberdinetan kokaturik erakusten dituzten argi-organoek, gaurko gure ezjakintza egoeran, organorik elektrikoenarekin ia erabat paraleloa den zailtasuna aurkezten dute.