PLATE XVI 
Fig. 1—4. Balanus amaryllis Darwin. 
Fig. 1. Outer maxillae; magnified 30 diameters. 
Fig. 2. Cirrus of second pair; magnified 14 diameters. 
Fig. 3. Cirrus of third pair; magnified 14 diameters. 
Fig. 4. Cirrus of sixth pair, two segments about the middle of the cirrus; magnified 44,5 diameters. 
Fig. 5—11. Balanus bimae n. sp. 
Fig. 5. Animal, lateral view; magnified 4 diameters. 
Fig. 6. a@ and 4, scutum and tergum, internal view; magnified 8 diameters. 
c and d, scutum and tergum, external view; magnified 8 diameters. 
Fig. 7. Labrum with palpi; magnified 44,5 diameters. 
Fig. 8. Mandible; magnified 44,5 diameters. 
Fig. 9. Maxilla; magnified 44,5 diameters. 
Fig. 9*. Maxilla, edge with spines; magnified 144 diameters. 
Fig. 10. Outer maxillae; magnified 44,5 diameters. 
Fig. 11. Cirrus of sixth pair, two of the middle segments; magnified 64 diameters. 
Fig. 12—13. Balanus albus n. sp. 
Fig. 12. Animal, lateral view; magnified 3,2 diameters. 
Fig. 13. @ and 4, scutum and tergum, internal view; magnified 4,6 diameters. 
c and d, scutum and tergum, external view; magnified 4,2 diameters. 
