Morphological Notes on the Terrestrial Triclad Rhynchodemus britannicus Percival.




  • 1The occurrence in Sheffield of the terrestrial planarian Rhynchodemus britannicus is recorded.
  • 2Variations in the genital system, in addition to those already recorded, are described, and it is suggested that these are stages in the attainment of sexual maturity.
  • 3A sphincter on the female vestibular apparatus formed by longitudinal muscles arranged spirally is described.
  • 4The previously recorded secretion of calcareous slime is attributed to gland cells in the ectoderm and subectodermal parenchyma.