PLATE II. 
Catenaria. — Cellularia. 
Figure 1 . — Catenaria attenuata, 
la, magnified. 
,, 2 . — Catenaria bicornis, .... 
2a, magnified ; 26, more highly magnified. 
„ 3. — Catenaria diaphana, 
3a, magnified. 
4. — Cellularia cirrata, 
4a, magnified ; 46, with ooecium. 
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