PLATE LVIII. 



JG. 



1. CELLULARIA CILIATA, p. 335. Of the natural size. 



2. A portion of the same magnified. The birdVhead pro- 



cesses are very imperfectly represented. 



3. OELLULARIA REPTANS, p. 337. Of the natural size. 



4. A portion of the same magnified. 



5. CELLULARIA SCRUPOSA, p. 336. Of the natural size. 



6. A portion of the same magnified. 



