208 



EXPLANATION OF PLATE 5 

 Figure Page 



23. Spondylus ictericus Reeve 44 



24. Plicatula gibbosa Lamarck 45 



25. Pecten rareneli Dall 47 



Fig. a. View of upper valve. Fig. 8, Lateral view. 



26. Pecten ziczac (Linne) 47 



27. Aeqnipecten mnscosns (Wood) 48 



