534 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



work. I wish also to express my appreciation to Mrs. E. B. Decker, 

 artist in the Division of Mollusks, for the careful drawing here 

 reproduced. 



FIG. 1.— KXTKRIOU AND INTERIOR OF SHELL TO SHOW THE TERMINOLOGY 0SED IN THE DESCRIPTIONS 



A. Anterior part. 

 M. Median part. 

 P. Posterior part. 



a. Anterior portion of median part, 

 in. Middle portion of median part, 

 p. Posterior portion of median part. 



Genus BANKIA Gray 



U. Umbones. 

 B. Blade. 

 K. Knob. 



1840. 

 1922. 



Bankia Ghay, Synop. British Mus., p. 76. 

 Bankia Bartsch, Bull. 122, U. S. Nat. Mus., p. 7. 



The genus is characterized by having the pallets consisting of a 

 series of cone-in-cone structures, which give to them the appearance 

 of an ear of wheat. 



Type. — Teredo bipalmulata Lamarck. 



Subgenus Bankia Gray 



1840. Bankia Ghay, Synop. British Mus., p. 76. 



1922. Bankia Bartsch, Bull. 122, U. S. Nat. Mus., p. 7. 



In this subgenus the distal end of the cones terminates in a thin 

 membrane, which is fimbriated at the free margin. The lateral fim- 

 briations form long awnlike projections. 



Type. — Teredo bipalmulata Lamarck. 



BANKIA (BANKIA) PHILIPPINENSIS, new species 

 PHILIPPINE SHIPWORM 



Plate 53, figs. 1,3; plate 56, fig. 8; plate 58, figs. 7, 8, 9 



Shell small, white. Umbone badly eroded. The anterior portion 

 covered by a heavy callused smooth area which is about one-third as 

 wide as the remaining anterior part. The dental ridges curve sud- 

 denly downward, immediately posterior to the callus, and then extend 



