Bull. U. S, F. C. 1890. Lamelllbranchiate Wiollusks. (To face page 436.) 



Plate LXXXIV. 



mo 



"f 



rn6 



Fig. 34 



•--,f 



me 



fnu 



og- 



_.fni 



Fig. 35 



me '"ig-Se 



-'S 



ab 



og - 



Kellogg del. 



Fig. 38 



