Abstract
A histochemical study of oxidative enzymes was carried out on various kinds of invertebrate muscles and the results obtained were as follows:
1. Insect flight muscles showed the presence of the most intense activity of succinic dehydrogenase and high activity of α-glycerophosphate and glutamic dehydrogenases.
2. Regarding crustacean striated muscles, prawn muscle was distinguished into types of fibers by oxidative enzyme reactions.
3. In molluscan muscles, the squid and octopus muscle fibers were distinguished into two types by their oxidative enzyme activities.
4. The earthworm body wall muscle was made of only one type of fibers, whose oxidative enzyme activities were low.