PLATE I. 
Catenicella. 
PAGE 
Figure 1. — Catenicella umbonata, . . . . . .13 
la, magnified. 
., 2, 3, 5. — Catenicella elegans, . . . . . .12 
2a, 3, 5, magnified. 
„ 4. — Catenicella pulchella, ...... 13 
4 a, magnified. 
„ 6. — Catenicella cribraria, . . . . . .11 
,, 7. — Catenicella .sacculata, . . . . . .12 
7a, magnified. 
