PLATE XX 



Fig. i — 7. Balanus compressus n. sp. 



Fig. 1. a and <$, scutum and tergum, internal view; magnified 8 diameters. 

 c and d, scutum and tergum, external view; magnified 10 diameters. 

 Labrum; magnified 64 diameters. , 



Mandible; magnified 144 diameters. 



Edge of mandible of the other side; magnified 144 diameters. 

 Edge of maxilla, with spines; magnified 206,5 diameters. 

 Maxillae; magnified 44,5 diameters. 

 Third cirrus, 5 t]l segment; magnified 144 diameters. 

 Sixth cirrus, one of the middle segments; magnified 44,5 diameters. 



Fig. 8 — 16. Balanus longirostrum n. sp. 



Fig. 8. Animal, lateral view; magnified 10 diameters. 



Rostrum, external view; magnified 10 diameters. 



a and b, scutum and tergum, internal view; magnified 13 diameters. 



c and d, scutum and tergum, external view; magnified 13 diameters. 



Labrum, with right-hand palpus; magnified 64 diameters. 



Mandible; magnified 64 diameters. 



Maxilla; magnified 64 diameters. 



Maxilla, edge with spines; magnified 206,5 diameters. 



Outer maxillae; magnified 64 diameters. 



Fourth cirrus, lower part ; magnified 64 diameters. 



Same cirrus, segments of pedicel and 3 segments of cirrus; magnified 144 diameters. 



Sixth cirrus, i6'h segment; magnified 64 diameters. 



Fig. 17 — 21. Balanus terebratus Darwin. 



Fig. 17. Group of specimens; magnified 10 diameters. 



Fig. iS. a and b, scutum and tergum, internal view; magnified 10 diameters. 



c and d, scutum and tergum, external view; magnified 10 diameters. 



Tergum, internal view; magnified 30 diameters. 



Mandible; magnified 144 diameters. 



Fourth cirrus, 4.^ segment; magnified 206,5 diameters. 



Sixth cirrus, one of the middle segments; magnified 144 diameters. 



