

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 (?) to be made out. It seems quite probable that the species is a Litharosaj 

 and not a Forites. 



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