56 LEPAS. 



dark purple with a light wash of the same towards the 

 base, which is greenish. The walls are very thick and 

 perfectly cellular, as represented in fig. 2. It is a 

 rugged shell at at all times, but more particularly so 

 when the valves are separated. Inhabits the South seas. 



POROUS ACORN. 

 PI. 9./. 4. Dr. Coomee. 



28. Lepas porosa. L. testa granulato striata, conica, tubulosa ; operculo 



ohtuso. Linn. Gmel. p. 3212. 

 Shell with granulate striae, conic, tubular : the lid obtuse. 

 Balanus squamosus. B. testa conica, cellulosa, extus squamis oblongis 



adpressis vestita, apertura subrotunda coarctata. Brug. Encycl. 



Meth. Hist. Nat. torn. 6. p. 170. 

 Ellis, Phil. Trans, vol. 50. p. 852. pi. 34. f. 11. Schroter, Journ. 4. 



pi. 2. f. 6. Favanne, Conch, pi. 59. f. A. 7. Chem. Conch. 8. pi. 98. 



f. 836, 837. Encyclop. Method, pi. 165. f. 9, 10. 



This species forms a regular cone, with the base 

 nearly twice the diameter of its height. The surface is 

 covered with linear excrescences, which are tubular 

 and terminate in openings at the base of the shell. 

 Like the preceding species it has four valves, which are 

 so closely connected together that no vestige of union 

 appears, except on the inside. The aperture is roundish, 

 and larger in proportion than in the preceding species. 

 The valves are thick and full of cells. The colour is 

 whitish or cinereous, and the size from that of the 

 figure to more than twice the diameter. 



