Abstract
The external and internal features of the first and second gonopods of the adult male red frog crab Ranina ranina were examined as one of a series of the reproductive studies. In the endopod of the first gonopod, an ejaculatory canal was formed a quarter from the proximal region and a cuticular plate was observed at the apical region. The second gonopod had a spoon-like stalk region, vertically divided into two halves by a central wall. Histological examination showed that the gonopods consist of cuticle, hypodermis, loose connective tissue, striated muscles and tegumental glands. The tegumental glands are present in the proximal region of both gonopods but are not abundant. Extracellular space located at the center of the gland was PAS positive. The transferance of spermatophore to spermathecae and the function of the tegumental gland are discussed.
