Bull. U. S. r. C. 1890. Lamellibranchiate Mollusks. (To face page 436.) 



Plate LXXXIII. 



Fig. 24 



'S- -m 



og- 



me 



Fig.25 



me Fig. 27 



Og.._ 



Fig. 26 



Fig. 28 



,-cl 



ct 



—-us 



SS 



Ct 



— -gl 



brm- 



Fig.29 



Fig. 30 



Fig. 3 1 



me 



Kellogg del. 



