Trans. Acad. Sci. of St. Louis 
EXPLANATION OF PLATE 
PLATE 
(All figures reduced *%) 
Teredo portoricensis 
Denticulate ridges of the anterior portion. x 100. 
Denticulate ridges of the anterior-median portion. x 100. 
Pallets. x 14. 
Exterior of right valve. x 14. 
Exterior of left valve. x 14. 
Interior of right valve. x 14. 
