CONTENTS. i 



Pars I. 



Fubl shed Féburanj 25, 1898. 



A Summary of Japinese Cicadidse, with Description of a New Species 

 y 



With Plate I M. Maisumura. 1 



On a New Species of Littoral 01igocha?ta (Pontodrilus matsushi- 



/ 



mensis). With Plate II A. lizuka 21 



l'eber eine wenig bekam; te eniheimische Schlange der Gattung Acha- 



linns (A. spinalis, Peters) M. Namiye 29 



Pars II. 



Published June 22, 1898. 

 On Ihe Affinity of our Wild and Domestic Silkworms. With^Plate 



III C. Sasaki 33 



The Genera and Species of RosselJidœ 2. ljima 41 



Pieliminary Notice of New Japanese Echinoids S. Yoshiwara. ~~ 57 



Miscellaneous Notes 63 



On the Appearance of the Grey Phalarope in Uraga Channel. — 

 Zoological Society of Tokyo. 



Pars HI. 



Published October 10, 1898. 

 ivew or Imperfectly Known Species of Karthworms. No. 1... 



The Boily-cavities of the Star-fish 



On a New Rhizopod Parasite ol Man (Amoeba Miurai n 8p.) 



Pars IV. 



Published December 31, 1898. 

 Notes on Some Embryos of Chlart ydoselachus arguineus Garm 



With 'Plate IV T. Nishikawa 95 



On Vermiculns limosup, a New Species of Aquatic Oligochœta S Hatai 10^ 



Insects Collected on Mount Fuji M Matsumura 113 



On the Variations of the Proportional Lengths of the Head, etc. as 



to the Total Length in our Commi n Eel C. Ishikawa 125 



S. Goto& S. Hittai. ... 65 



S. Goto 79 



I. ljima 85 



