Bartsch. — a xew shipworm from chile I49 



two shells are at once distinguished by the huge auricle 

 in Bankia [Bankia) setasea Tryon, which is almost absent 

 in the new species. The anterior median denticulated área 

 in the new species is almost double the width of that in 

 Bankia [Bankia] setacea. Yiewed from the inside, the au- 

 ricle projects twice as much externally beyond the edge 

 of the shell as it extends internally in Bankia (Bankia) 

 setacea, while in the new species the projection is but tri- 



In addition to the type, the posterior end, consisting 

 of the pallets and the siphons of another specimen, are in 

 the sending. 



