Chapter XVIII: Section C: 223

14. Balanus trigonus 223 15. Balanus spongicola 225 16. Balanus lævis 227 Var. nitidus, Coquimbensis 17. Balanus perforatus 231 Var. angustus, Cranchii, fistulosus, mirabilis 18. Balanus concavus 235 19. Balanus amphitrite 240 Var. communis, venustus, pallidus, niveus, modestus, Stutsburi, obscurus, variegatus, cirratus Varieties 245 20. Balanus pocilus 245 21. Balanus eburneus 248 22. Balanus improvisus 250 Var. assimilis 23. Balanus nubilus 253 24. Balanus corrugatus 254