Plate XIV. 



Figs. 1, 2. Pecten ketus Gould. Eight valves. 1. Yokosuka. 2. Naganuma. p. 152. 



Figs. 3, 4. Pecten squamatus Gmelin. 3. Right valve. 4. Left valve. Naganuma. 



Figs. 5, 6. Pecten tigerrinus Müller. 5. Left valve. 6. Right valve. Koshiba. p. 155. 



Figs, 7, 8. Pecten tokyoensis Tok. 7. Eight valve from Naganuma reduced to two- 

 thirds. 8. Left valve from Kami-Miyata reduced to four-fifths, p. 158. 



Figs. 9, 10. Pecten laqueatus Sow. 9. Eight valve from Kami-Miyata. 10. Left 

 valve from Shimo-Miyata. p. 160. 



Fig. 11. Pecten swiftii Bern. Eight valve. Koshiba. p. 154. 



