Notes on Japanese Triclads. H. 1} 



By 



Tokio Kaburaki, Rigakushi, 

 Zool. Inst., Sci. Coll., Tokyo. 



4. On the Formation of the Spermatophore. 



The spermatophore of Triclads has hitherto been known from 

 several species, always contained in the cavity of the receptaculum 

 seminis or the so-called uterus. By some authors (Kennel, 2) Micoletzky 3) ) 

 it was alleged that the spermatophore originates in that organ, the 

 substance of the capsule being supposed to be the secretory product of 

 the latter; while others (Schultze, 4) Woodworth, 5) Bergendal, 6) Weiss 7) ) 

 assumed its formation in the penis, ascribing the source of the capsule 

 to the penis glands, and that it is introduced, by the act of copulation, 

 into the receptaculum seminis of a second individual. In view of this 

 disparity in the views of authors, it will be of interest to place on 

 record a case, observed by me, of Planaria vivida Ij. et Kab., in which 



1) Continuation of "Notizen üb. jap. Tricladen," p. 325 of this volume of the journal. 



2) Kennel, J., 1S89. Untersuchungen an neuen Turbellarien. Zool. Jahrb.., Abteil, f. 

 Anat. u. Ontog.. Bd , III, Heft 3, p. 458. 



3) Micoletzky, H., 1907. Zur Kenntnis des Nerven- und Excretionssystems einiger 

 Süsswassertricladen nebst andern Beiträgen zur Anatomie von Planaria alpina. Zcitschr. f. 

 wiss. Zool. Bd. LXXXVII, pp. 426, 427. 



4> Schultze, M., 1852. Zoologische Skizzen. Zeitschr. f. wiss. Zool. Bd. IV, 1853, pp. 

 186, 187. 



5) Woodworth, W. M., 1891. Contribution to the Morphology of the Turbellaria. I. On 

 the Structure of Phagocata gracilis Leidy. Bull. Mus. Comp. Zool. Harvard Coll. Vol. XXI. 

 PP- 3Ï. 32. 



6) Bergendal, D., 1890. Studien über nordische Turbellarien und Nemertincn. Vorl. 

 Mitt. Ofversigt Kongl. Vetenskaps- Acad. Förhandl. Nr. 6, p. 326.— 1892. Einiges über den 

 Uterus der Tricladen. T'estschrift z. 70 Geburtstag R. Leuckarts. p. 318. 



7) Weiss, A., 1910. Beiträge zur Kenntnis der australischen Turbellarien. Zeitschi - , f. 

 wiss. Zool. Bd. XCIV, Heft 4, pp. 584-586. 



