142 
PERNA TRANQUEBARENSIS. 
TAB. CXIV. 
P. testa elongata, atro-purpurascente, uni-alata ; apice mar- 
gineque interné nigricantibus. 
Habitat in mari apud Tranquebar. 
TRANQUEBAR PERNA. 
Shell elongate, ‘black purplish, with one wing; apex and 
margin internally blackish. 
This: species inhabits the sea about Tranquebar. It is 
certainly distinct from any of the described species. 
