250 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
three ; the arrangement into cycles does not appear perfectly regular and uni- 
form, so Duncan’s figures must be used with a qualification. In the best pre- 
served portions there is no granulate area on the summit of the wall between 
the ends of the septa. Apparently the upper edge of the wall is acute in per- 
fect material. Diameter of the calices 2.5 to 4 mm.; the usual diameter is 
slightly less than 3 mm. The specimen does not permit the details of the 
pali (2) to be made out, It seems quite probable that the species is a Litharea, 
and not a Porites. 
