PLATE XXII 



Fig. i — 2. Balanus quadrivittatus Danvin. 



Fig. I. Fourth cirrus, pedicel and lower segments; magnified 64 diameters. 

 Fig. 2. Sixth cirrus, one of the middle segments; magnified 64 diameters. 



Fig. 3 — 10. Balanus quinquevittatus n. sp. 



Fig. 3. Shell attached to shell of Gastropodous mollusc ; magnified 4 diameters. 

 Fig. 4. a and /;, scutum and tergum, internal view; magnified 7,6 diameters. 



c and d, scutum and tergum, external view ; magnified 7,6 diameters. 



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



Mandible ; magnified 64 diameters. 



Maxilla; magnified 64 diameters. 



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

 Fig. 8. Outer maxillae ; magnified 64 diameters. 



Fig. 9. Fourth cirrus, pedicel and lower segments; magnified 144 diameters. 

 Fig. 10. Sixth cirrus, one of the middle segments; magnified 144 diameters. 



'iiis hystrix n. sp. 



Shell, side-view; magnified 7,5 diameters. 



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

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

 Labrum, with left-hand palpus; magnified 144 diameters. 

 Mandible; magnified 144 diameters. 

 Maxilla, edge with spines; magnified 144 diameters. 

 Third cirrus, 5H1 segment; magnified 206,5 diameters. 

 Fifth cirrus, 5 th segment; magnified 206,5 diameters. 

 Sixth cirrus, io th segment; magnified 206,5 diameters. 



lus calceolus Ellis. 



Shell, side-view; magnified 4,5 diameters. 

 a and b, scutum and tergum, internal view. 

 c and d, scutum and tergum, external view. 

 Labrum, with right-hand palpus; magnified 44,5 diameters. 

 Mandible; magnified 44,5 diameters. 

 Maxilla; magnified 44,5 diameters. 



Edge of maxilla, with spines ; magnified 144 diameters. 

 Outer maxillae; magnified 44,5 diameters. 

 Fig. 25. Sixth cirrus, one of the middle segments; magnified 64 diameters. 



Fig. 26. Balanus navicula Darwin. 



Fig. 26. a and b, Shell, seen from right and left side; magnified 7,5 diameters. 



