Descriptive Catalogue of the British Testacea. 23 
to be obvious; and, even if a difference in the contained ani- 
mals should be objected, we cannot agree to that particular 
being made a ground of distinction, since it is not the ex- 
clusive consideration on which Linnzeus professes to found his 
arrangement? 
A 
Balanus. 
L. testa conica. sulcata, operculis acuminatis. Linn. 
Syst. Nat. n. 10. p. 1107. Fauna Suecica, n. 2122. 
Linn. Gmel. p. 3207. 
Ellis in Act. Angl. 1158. t. 34. f. 17. 
Pennant Brit. Zool. t. 37. f. 4. 
Da Costa Brit. Conch. p. 249. Bal. porcatus. 
Donovan Nat. Hist. of Shells, t. 30. f. 1. 
Chemn. Conch. 8. t. 97. f. 820. 
Pulteney in Hutch. „Dorset. Pe 25. 4E 2. ge 12. Bal. 
communis. © 
Montagu Test. Brit. p. 6. 
Habitat frequens in mari, saxis, rupibus adherens, ! 
Testa conica, truncata, valvulis pluribus conniventibus, extus inzequali- 
ter sulcata, interjectis rugis compressis, 
Operculum valvulis quatuor obliquis, acuminatis, superioribus duabus la- 
tioribus brevioribus transversé striatis, inferioribus 2 angustioribus 
longioribus. (Linn. Mus. Lud. Ulr. p. 466.) : 
- L. testa conica truncata levi, spares nen Linn. 
pda Suecica; n. 2123. PL, 
Lister Pri Mr t. 5.f. 
- Conch. t. 444. f. 287. 
- D'Argenv. Conch. t. 30. f. C. 
Pennant Brit. Zool. 4. t. 37. f. 5. Oa 
Da Costa Brit. Conch. p. 248, t. 17. f. F Bal. Taipi. | 
Pulteney 
