PLATE XXXVL 



FIG. II. III. 

 LEPAS BALANOIDES. 



COMMON ACORN SHELL, 

 SPECIFIC CHARACTER 



SYNONYMS. 



Shell conic truncated, of six valves. Operculum bifid. 



Lepas Balanoides : testa conica truncata ; operculo obtuso. 



Linn. Faun. Suec. 1. p. 385. No. 1348 2. 



No. 2123, 

 Balanus vulgaris parvus conicus e senis laminis compositus, vertice 



operculo bifido rhomboide occluso. Da Br. 



Conch, p. 248. sp. 68. tab. 11, Jig. 1. 

 Balanus cinereus, velut e senis laminis striatis compositus, ipso vertice 



altera testa, bifida, rhomboide occluso. Balani 



parva species. List. H. Aw. Angl. p- 196. 



tit. 41. tab. 5. Jig. 41. 



These shells are found in the greatest abundance on all the British 

 shores, adhering to rocks, shells^ Me. Kc* 



Da Costa says, this species, when not affixed on flat, but uneven 

 surfaces, sometimes, but rarely, extend down into a pretty long rugged 

 tubular stalk or root. This variety is noted by Pennant, and an ex- 

 traordinary, but mutilated specimen of it, is shewn at fig. 3. 



