PLATE VI. 
Fig. 1. BALANUS communis. 
Balanus communis, Mont. Test. Brit. p. 6. 
Lepas balanus, Donov. Brit. Sh. pi. 30, fig. 1. — Mat. and Rack, in Lin. Tr. viii. p. 23. 
Fig. 2 and 3. BALANUS costatus. 
Balanus costatus, Mont. Test. Brit. p. 11. 
Lepas costata, Donov. Brit. Sh. pi. 30, fig. 2. — Mat. and Rack, in Lin. Tr. viii. p. 24. 
Balanus angulosus. Lam. Syst. v. p. 390. 
Fig, 4. BALANUS ovularis. 
Balanus ovularis. Lam. S^st, v. p. 392. 
Balanus balanoides, MoJit. Test. Brit. p. 7- 
Lepas balanoides. Mat. and Rack, in Lin. Tr, viii. p. 23 — Donov. Brit. Sk. pi. 36. fig. 2. 
Fig. 5. BALANUS ovularis, an elongated variety. 
Fig. 6. BALANUS rugosus. 
Balanus rugosus, Mont. Test. Brit. p. 8. 
Lepas rugosa. Mat. and Rack, in Lin. Tr. viii. p. 25. 
Lepas borealis, Donov. Brit. Sk. pi. 160, lower figure. 
Fig. 13, 14. Opercular valves of Balanus rugosus. 
Fig. 7. BALANUS conoides. 
Balanus conoides, Mo7it. Test. Brit. p. 12. 
Lepas conoides, Donov. Brit. Sh. pi. 30. fig. 3 Mat. and Rack, in Linn. Tr. viii. p. 24. 
Fig. 9, 10. BALANUS scoticus. 
Lepas Scotica, Wood's Conch, p. 40, pi. 6. fig. .3. 
Fig. 9, from Dr Leach's Cabinet in the British Museum, found in the Frith of Fortli. Fig. 10, found by W. C. 
Trevelyan, Esq. junior, of Wallington, at Hartlepool, adhering to a specimen of the Fusus antiquus, and in the 
magnificent museum of John Trevelyan, Esq. at Wallington, Northumberland. 
Fig. 8. BALANUS scoticus. An elongated variety in the British Museum. 
Found on the south Devonshire coast by Dr Leach. 
Fig. 11, 12. Opercular valves of Balanus Scoticus. 
