CONTENTS. 



Art. 1.— Revisio Aceracearum Japonicarum. (With 33 plates). By G. Koidzumi. 



— Publ. Augi\st 2ncl, 1911. 



Art. 2.— Beobachtungen an einer Süsswasser Peridinee. (Mit 1 Tafel). 



By N. Ohno.— Publ. November 20th, 1911. 

 Art. 3.— Observations and Experiments on the Ctenophore Egg: i. The 



Structure of the Egg and Experiments on Cell-division. By N. Yatsu. 

 —Publ. April 29th, 1912. 



Art. 4.— Etudes Anthropologiques. Les Aborigènes de Formose. Fase. II. 



—By K. ToRii.— Publ. January. 16th, 1912. 

 Art. 5.— Climatic Changes in Japan since the Pliocene Epoch. (With i plate). 



By M. Yokohama. —Publ. Oct. 2nd, 1911. 



Art. 6.— On Nepheline-basalt from Yingé-mên, Manchuria. (With 2 plates). 



By B. KotA— Publ. June 7th, 1912. 

 Art. 7.— The Systematic Motions of Sun-spots. (With 3 plates). 



By S. HiRAYAMA.— Publ. June 7th, 1912. 

 Art. 8.— The Metallogeny of the Japanese Islands. (With 1 map). 



By C. IwASAKi.— Publ. November 3rd, 1912. 



Art. 9.— Oogonium Liberation and the Embryogeny of Some Fucaceous 

 Algae. (With 3 plates and 5 text-figures). By M. Tahara.— Publ. 

 March 31st, 1913. 



Art. 10.— Beiträge zur Kenntnis der Morphologie und Stammesgeschichte 



der Gorgoniden. (Mit 13 text-fignres). By K. KiNosHiTA. — Publ. March 



31st, 1913. 

 Art. 11.— Ueber die charakteristische Mannigfaltigkeit der Partiellen 



Differentialgleichungen erster Ordnung. By T. Y'oshie. — Publ. 



August 25th, 1913. 



Art. 12.— On Cyathocormus mirabilis nov. gen., nov. sp., the Type of a 

 New Family of Compound Ascidians from Japan. (With 3 plates 

 and text-figures). By A. Oka.— Publ. March 30th, 1913. 



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