CONTENTS. 



Studies on Reproductive Elements. I- Spennatogonesis, Ovogenesis, and 

 Fertilization in T>ii(j)toiin(.s sp. ]!v C. Iskhcawa, I'h. 7\, Itiiifil.iihdJnislii, 

 Professor of Zoology, Agricultural College, Imperial Uiiiversity. O^ilh 

 I'lateT.) I 



Further Studies on the Formation of the Germinal Layers in Clielonia. 



(Contributions to tlie Embryology of lîeptilia III). J>y K. MiTsrivVia, 

 rii. ]>., lUijaliihakushi, Professor of Zoology, College of Science, Imperial 

 University, Tokyo, Japan. ("Willi I'lntcs If-f\'.j 3;!> 



On the Development of Limulus Longispina. i5v Kamakichi Kishinouvk, 



I!i(/(i/.-uvhi, College of Science, Imperial Cniversity. (With I'latcx V-Xf.) 5i} 



On the Lateral Eyes of the Spider. I>v Kamakkhi Kishinouyk, JH'jakushi, 



College of Science, Imperial University 101 



Notes on a Collection of Birds from Tsushima. ^>v I. Ihma, I'h. l>., 



I!iij<il:iislu\ lliiiii/,ii]t(iJ,-iis/u\ Professor of Zoology, College of Science, Im- 

 perial University. ("With I'laU-s XII.) 105 



On the Formation of the Germinal Layers in Petromyzon. P>v S. 



Hatta. Zoological Laboratoi-y, College of Scit'nce. ("With I'lotes Xfff. 

 XIV.) Vl\) 



The Disturbance of Isomagnetics attending the Mino-Owari Earth- 

 quake of 1891. 1''^' A. ÏANAKAnATK, I liijahuh'/hiishi. /•'. //. V. /■,'., I'ro- 

 fessor of Physics and H. Xac^aoka. lliiioLiishi. Assist. Professor of I'liysics. 

 College of Science, Imperial University. rWitli I'lalts XV-XX[f.j ... llff 



Optical Note. K. Takizaw\ lOH 



The Archaean Formation of the Abukuma Plateau. P>v P. Koiv,. rii. i>.. 



l!i[iii/.-iihiil,'iishi, Professor of Genlogy, College of Science, Imperial Univer- 

 sity. rWith riutes XXlI-XXVlf.) 197 



On the Cause of the Great Earthquake in Central Japan, 1891. I'>v 



P. KoTc), I'h. IK, IHii'i/ntJtn/riishi. Professor of Geology, College of Science, 

 Imperial University. (With I'hitrs XXVfff-XXXW) '19r> 



