LEPAS. 35 



Muller's definition of the L. Diadema is perfectly cor- 

 rect, except that the word subcylindrica would have 

 been more appropriate than subconica. 



WHALE ACORN. 

 PL 5./. 1, 2, S. Dr. Coombe. 



3. Lepas balsenaris. L. testa subconica, valvulis sex elevatis, longitudi- 



naliter sulcatis. 

 Shell somewhat conic, with six raised valves, grooved longitudinally. 

 Wrinkled star cake. Petiv. Amb. Icon. t. 1. f. 11. 

 Rumph. Mus. t. 14. f. H. Walch. Naturg. 10. t. 1. f. 11, 12. Chem. 



Conch. 8. t. 99. f. 845, 846. 



Shell of six valves, grooved longitudinally and stria- 

 ted transversely : intermediate spaces showing the con- 

 necting sutures on one side, and ending in a point at 

 the base of the shell. Valves grooved regularly in 

 young shells, but often distorted in old ones. Height 

 about an inch, aperture at top half an inch, diameter 

 across the bottom one inch and three quarters. 



This shell is evidently a distinct species, and not, as 

 has been supposed, a variety only of the preceding. It 

 has a much smaller opening ; the interior is not funnel- 

 shaped ; the valves in full-grown shells, are not so pro- 

 minent ; the intermediate spaces are narrower, and the 

 six divisions which correspond with them beneath, are 

 ramified, as expressed in fig. 3. The specimen of the 

 Lepas balcenaris represented by Dufresne, in the first 

 vol. of the Annates du Museum d'Histoire Naturelle, if 

 intended for a young shell, is too convex ; if for an old 

 one, too regular. He professes to have acquired his 

 knowledge of this species from Hunter's Museum, 

 where he says, that many of these shells are sunk in the 



