REFERENCES
- Ball , I. R. , Gourbault , N. and Kenk , R. 1981 . The planarians (Turbellaria) of temporary waters in eastern North America . Life Sci. Contrib. R. Ont. Mus , 127 : 1 – 27 .
- de Beauchamp , P. 1928 . Nouvelles diagnoses de triclades obscuricoles. 1° . Planaria racovitzai , 53 : 510 – 513 . n. sp. Bull. Soc. Zool. Fr
- de Beauchamp , P. 1937 . Nouvelles diagnoses de triclades obscuricoles . 5° et 6°. Bull. Soc. Zool. Fr , 62 : 265 – 272 .
- Benazzi , M. 1938 . Tricladi paludicoli della Sardegna . Arch. Zool. Ital , 25 : 85 – 94 .
- Benazzi , M. 1942 . Ulteriori osservazioni su una Fonticola (Atrioplanaria sec. de Beauchamp) della Sardegna . Boll. Zool , 13 : 28 – 34 .
- Benazzi , M. 1969 . Annotazioni citosistematiche sui tricladi di alcune isole tirreniche . Accad. Naz. Lincei, Rend. Cl. Sci. Fis. Mat. (Ser. 8) , 46 : 605 – 609 .
- Benazzi , M. and Gourbault , N. 1977. . Atrioplanaria morisii n. sp., a new cave planarian from Italy . Boll. Zool , 44 : 327 – 335 .
- Boddington , M. J. and Mettrick , D. F. 1971 . Supernumerary copulatory organs in Dugesia tigrina (Girard, 1850) (Platyhelminthes: Turbellaria) . J. Fish. Res. Bd. Canada , 28 : 1198 – 1199 .
- Castle , W. A. 1928 . An experimental and histological study of the life cycle of Planaria velata . J. Exp. Zool , 51 : 417 – 483 .
- Child , C. M. 1913 . The asexual cycle of Planaria velata in relation to senescence and rejuvenescence . Biol. Bull , 25 : 181 – 203 .
- Dahm , A. G. 1964 . The taxonomic relationships of the European species of Phagocata (? = Fonticola) based on karyological evidence (Turbellaria, Tricladida, Paludicola) . Arkiv. Zool. (2) , 16 : 481 – 509 .
- Gourbault , N. 1969 . Triclades obscuricoles des Pyrénées. III. Contribution à l'étude des . Atrioplanaria: Atrioplanaria delamarei , 24 : 377 – 385 . sp. n. Ann. Spéléol
- Gourbault , N. 1976 . Recent karyological research on cave planarians from Europe . Int. J. Speleol , 8 : 69 – 74 .
- Gourbault , N. and Benazzi , M. 1977 . Étude caryologique du gerne Atrioplanaria (Triclade paludicole) . Arch. Zool. Exp. Gen , 118 : 53 – 61 .
- Kenk , R. 1935 . A morphological proof of the existence of zooids in Euplanaria dorotocephala . Physiol. Zool , 8 : 442 – 456 .
- Kenk , R. 1936 . Eine neue Höhlentriklade, Fonticola opisthogona n. sp . Zool. Anz , 113 : 305 – 311 .
- Kenk , R. 1937 . Eine neue Süsswassertriklade aus der Umgebung von Graz, Fonticola prosorchis n. sp . Zool. Anz , 117 : 43 – 48 .
- Kenk , R. 1974 . Index of the genera and species of the freshwater triclads (Turbellaria) of the world . Smithsonian Contrib. Zool , 183 : 1 – 90 .
- Okugawa , K. I. 1955 . On the supernumerary sexual organs of Dugesia gonocephala (Dugés), induced by the low temperature . Bull. Kyoto Univ. Educ. Ser.?, Math. Nat. Sci , 6 : 1 – 14 .
- Schnur , L. F. 1969 . The use of methylene blue for staining cestodes . J. Sci. Tech , 15 : 33 – 34 .