14 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Graff, L. von. 
1882. Monographie der Turbellarien. I. Rhabdocclen, Leipzig. 
Grube, E. 
1872. Beschreibung von Planarien des Baikalgebietes. Arch. Naturg., 
Jahrg. 38, Bd. I. pp. 273-292, Taf. XL, XIL 
Hallez, P. 
1890. Catalogue des Turbellariés (Rhadoccelides, Triclades et Polyclades) 
du Nord de la France, etc. Lille. Also in Rev. Biol. Nord de la France, 
Tom. II., IV., V., 1890-93. 
Hallez, P. 
1892. Morphogénie générale et affinités des Turbellariés. Lille. 
Iijima, I. 
1884. Untersuchungen über den Bau und die Entwicklungeshichte der 
Süsswasser Dendrocœlen (Tricladen). Zeitschr. wiss. Zool., Bd. XL. 
pp- 359-464, Taf. XX.-XXILL 
Iijima, I. 
1887. Ueber einige Tricladen Europa?s. Jour. Roy. Coll. Sci., Imp. Univ. 
Japan, Vol. I. pp. 387-358, Plate XXV. 
Kennel, J. von. 
1888. Untersuchungen an neuen Turbellarien. Zool. Jahrb., Abth. Anat. 
u. Ont., Bd. III. Heft 3, pp. 447-486, Taf. XVIII., XIX. 
Lang, A. 
1884. Die Polycladen. Fauna u. Flora d. Golfes v. Neapel, XI. Leipzig. 
Leidy, J. 
1848. Descriptions of Two New Species of Planaria. Proc. Acad, Nat. Sci. 
Philad., Vol. III. pp. 251, 252. 
Leidy, J. 
1848. Descriptions of Two New Species of Planaria. Ann. Mag. Nat. 
Hist., Ser. 2, Vol. I. p. 78. 
Leidy, J. 
1852, Helminthologieal Contributions, No. 2. Proc. Acad, Nat. Sci. 
Philad., Vol. V. pp. 224-227. 
Leidy, J, 
18522, Helminthological Contributions, No. 3, Proc. Acad. Nat, Sci. 
Philad., Vol. V. pp. 239-244, 
Leidy, J. 
1852, Corrections and Additions to former Papers on Helminthology. 
Proc. Acad. Nat. Sci. Philad., Vol. V. pp. 284-290. 
Leidy, J. 
1885. Planarians. The Museum, Vol. I. No. 4, pp. 49-52. 
Leuckart, R. 
1852. Mesostoma Ehrenbergii anatomisch dargestellt. Arch. Naturg., Jahrg. 
18, Bd. I. pp. 234-250, Taf. IX. 
