Sisor rabdophorus—A study in adaptation and natural relationship 4. The head and pectoral musculature



A detailed study of the head and pectoral musculature is reported. Many of the specializations and peculiarities can be correlated with the sluggish and bottom living habits of the fish. Muscles developed in connection with the movement of the maxillary and mandibular barbels and the strong pectoral spine are particularly noteworthy. No special muscles are found for the movement of the premaxillae.