26 LEPAS. 



and 4. Favanne, t. 59. f. A. 4, aud A. 5. Ewe. iHef^. 

 t. 165. f. 17 and 18. 



Inhabits the Sea on the backs of Turtles. Coasts of Amboyna. 

 Rumphius. Ascension Island. Petiver. Gulf of Venice. 

 Barbut. Bay of Naples. Sir C. Ulysses. 



Shell often near two inches in diameter, and about one fourth 

 as high, composed of six broad triangular thick valves, with 

 the intermediate spaces deep and narrow ; the cavity is twice 

 as large at the base as at the aperture, and the base of the 

 shell is composed of numerous irregular crowded laminae. 



A*** Porous at the Base. 



porosa. 26. Shell sub-conical, with four consoli- 

 dated rugged valves, and the base porous. 



Lepas porosa. Chemnitz, viii. p. 314. t 98. f. 836 and 



837. Gmelin, p. 3212. Wood's Conch, p. 56. t. 9. f. 4. 

 Lepas cariosa. Pallas Nov. Act. Petropolitana, ii. p. 240. 



t. 6. f. 24. A. and B. Gmelin, p. 3214. Wood's Conch. 



p. 58. 

 Lepas, No. 7- Schroeter Einleitung, iii. p. 527. 

 Balanus flbrosus. Solander's MSS. Callone's Catalogue, 



p. 56. 

 Balanus squamosus. Bruguiere Enc. Method, p. 1 70. 

 Phil. Trans, l. t. 34. f. 11. Favanne, t. 59- f. A. 7. Enc. 



Method, t. 165. f. 9 and 10. 

 Inhabits the coasts of Tranquebar, and other parts of the East 

 Indies. Chemnitz. Granada. Solander. Kurile Islands. 

 Pallas. Falkland Islands. Humphreys. 

 Shell generally about an inch and a quarter in diameter, and 

 half an inch high ; the colour is greyish white, and the outer 

 surface is covered by the projecting points of the capillary 

 tubes of which the whole shell is formed, so as to give it a 

 carious appearance. — L. porosa of Chemnitz, and L. caiiosa 

 of Pallas, appear to be the same species. 



purpurascens. 27. Shell angular, with four sub- 

 consolidated rugged valves, and the base 

 porous. 



Lepas purpurascens. Wood's Conch, p. 55. t. \). f. 1 to 3. 

 Inhabits the South Seas. Mr. Wood. 

 This species is of the same size as L. porosa, to which il is 



