PLATE LXXXV. 
PAOE 
Figs. 1, 2. ISOCAKDIA IGNOLEA n. sp 318 
1. Exterior of riglit valve. Cove Point? 
2. Interior of left valve of same individual. 
Pigs. 3,- 4. IsocAHDiA FRATERNA Say 317 
3. Exterior of right valve. Jones Wharf. 
4. Interior of left valve. Same locality. 
77 
