PLATE XXX. 



FIG. 11. 

 LEPAS COSTATA. 



RIBBED ACORN SHELL. 

 SPECIFIC CHARACTER. 



Shell somewhat conic. Ribs equidirtant and diverging from the 



aperture. Operculum sharp pointed. 

 Lepas Costata : testa subconica operculis acutis: valvulis costatis. 



This curious and rare species, which has not been hitherto de- 

 scribed or figured, was found by the late T. Adams, Esq. of Pem- 

 broke, adhering to pieces of broken rock, and is in the pofTeflion of 

 the Rev. T. Rackett, of Spetisbury, Dorset, to whose liberality wc 

 indebted for figures of this, and several other Britifli fliells not in- 

 cluded in our own collection. 



FIG. III. 

 LEPAS CONOIDES. 



SPECIFIC CHARACIER. 



Conic. Smooth, valves pointed at the apex : aperture very small. 

 Lepas Conoides : testa conica IcEvi valvulis acumlnatis, apertura 



ansfustiflima. 



Found by Mr. Bryer of Weymouth, affixed to the Lepas anatifera. 



