90 ART. 2. A. TOKUNAGA. 



Potamidcs imilfifuriiiis L. — Tokyo. 



Pytwnidella tenuiscidpta Lke. — Tokyo Bay. 



PhasianeUi oligomphala Pilsbry. — Tokyo, Nenioto in Awa (or Bôsliu). 



Parapholas p'mita Conrad. — Tokyo. 



Pectimculus rotundus Dkr. — Tokyo Bay. 



Pijramidella eximia Lke. — Tokyo, Kamakura. 



Rissoina adamsiana ^Vkff. — Kacliiyaiiia in Awa (or Jdoshu"). 



Eœtci pulchella Ad. and Rve. — Yokohama, 



Rœta ijokohamcnsis ]'iî.sbrv. — Yokohama. 



Separatista s^paratista Dillv. — Nemoto in Awa for Boshu). 



Sigaretus japmieus Lke. — Tokyo. 



Scalaria casta A. Ad. — Tokyo, Yokohama, Kamakura. 



Terehra hathyrhaphe Smith. — Tokyo Bay. 



Triton dorsuosum Ad. — Tateyama in Awa (or Boshu). 



Turbo guttatus A. Ad. — Tateyama in Awa (or Boshu ). 



Trochus yokohamensis Pilsbry. — Yokohama. 



Troehus japonica Smith. — Tokyo Bay. 



Trochus paupereulus L. — Tokyo. 



Tellina ovalis Sow. — Tokyo. 



Tapes undulatus Born. — Tokyo Bay, Tateyama in Awa (or Boshu). 



Vermetus tohyœnsis Pilsbry. — Tokyo. 



Venerupis purpurea Dkr. — Nemoto in Awa (or Boshu). 



Yoldia lischkei E. A. Smith. — Yokohama, Enoshima. 



Tellina minuta Lke. — Tokyo Bay. 



Venus yedœnsis Lke. — Kamakura, Tokyo Bay. 



Y. Species found in Tokyo and elsewhere very widely 

 distributed. 



■•• Saxieava arctiea Df>sh. — Tokyo, Noto, Awa, Osaka, Hakodate, North- 

 eastern and Northern Sea of x\sia. Western Coast of America, 

 Euroi)e, Africa, Indian Ocean, Australia. 



* Saxidomus nuttali Coxrad. — Tokyo, Misaki, Enoshima, Hakodate, 



ILarima, Setouchi, Bonin Is., Kamtschatska, Sitcha, India, Cliile, 

 California. 



* Dosinia exoleta TjInx. — Tokyo, Hakodate, Misaki, Kii, Setouchi, Chifu, 



Nortli China, Sjjain, France, Piedmont, Corsica, Naples, Tarent, 

 Sicily, Ustrica, Adria-Zara, ^\'nedi,^•, Morca, Tunis, Algeria, 

 lialearen, Norway, Great Britain, Portugal, Mediterranean Sea, 

 from Nortli Cai)e (72° N.) to Senejral (15° N). 

 '■'•' Tapes dec'Hssata Dkr.— Tokyo, Hako hite, Kitami, Enoshima, Misaki, 

 Nagasaki, Uikuzen, Oshima, West Coast of Sakhalin, Olga Bay, 



