Studies on striped muscle structure. III. The comparative histology of cardiac and skeletal muscle of scorpion

The present investigation deals with the striped muscle of the Florida scorpion,2 including the post-abdominal (‘tail’), preabdominal, cephalo-thoracic, leg, and heart muscle of both the adult and the new-born. In the latter material occur important developmental stages, which throw valuable light upon the more involved adult structure. As was to be expected the striped muscle of scorpion is very similar to that of Limulus, and accordingly conforms more closely to the vertebrate type of striped muscle than to the arthropod type as exemplified, for example, by the sea-spider, Anopoldactylus lentus, already described, and by certain insects. Apart from being, as far as I am aware, the first detailed microscopic study of this muscle, the chief value of this investigation inheres in the information it yields, by reason of the greater