DEEP-SEA PROTOBRANCHIA (BIVALVIA) 



85 



lg. 140 Yoldiella artipica (a), Y. similis (s) & (separately) Y. 

 lata(p). 



g. 141 Yoldiella sinuosa (s), Y. blanda (bl) & Y. biscayensis (bi). 



Fig. 142 Yoldiella Jeffrey si (j) & Y. enata (en). 



Fig. 143 Yoldiella ella (el). 



Fig. 144 Yoldiella americana (a), Y. subcircularis (s) & Y. perplexa 

 (P). 



