70 LEPAS. 



MEMBRANOUS BARNACLE. 



42. Lepas membranacea. L. carnosa, alba, superne truncata, acuminata, 

 testis quinque angustis marginalibus. 



Animal fleshy, white, truncated at top and acuminate ; shells five, nar- 

 row and marginated. 



Mont. Test. Brit. Suppl. p. 164. 



This species differs from the preceding in the mem- 

 brane only, which is quite white, and without any 

 stripes. It is less than the other, the largest specimen 

 in the possession of the author not exceeding an inch 

 and a quarter in length. The principal valves in both 

 somewhat resemble the hammer oyster in shape. Mr. 

 Montagu, to whom we are indebted for the knowledge 

 of this shell, has reason to believe that it was taken on 

 the Welch coast. 



The valves, both of this and the preceding species, are 

 the rudiments of shells ; the beginning of operations 

 which are completed in the L. anatifera. 



EARED BARNACLE. 

 PL 12. /. 4. Dr. Leach. 



43. Lepas aurita. L. testa membranacea, ventricosa, tubo insidente, ore 



octovalvi dentato; tubulo gemino aurito. Linn. Syst. Nat. ed. 12. 



p. 1110. 

 Shell membranaceous, ventricose, seated on a tube and eared : mouth 



of eight valves, toothed. 

 Lepas nuda carnosa aurita. Ellis, Phil. Trans, vol. 50. pi. 34. f. 1. 

 Seba, Mus. 3. t. 16. f. 5. Edw. av. 2. t. 286. f. A. Chem. Conch. 8. 



pi. 100. f. 857, 858. Brug. Encycl. Meth. Hist. Nat. torn. 6. p. 66. 



This species has a membranous, cylindrical stalk, 

 dilated at top, and terminating in two tubular appen- 

 dages, or ears. The aperture through which the animal 



