PLATE CLX. 



LEPAS BOREALIS. 



NORTHERN ACORN SHELL, 

 GENERIC CHARACTER. 



Animal Triton. Shell affixed at the base ; multivalve ; the valves 



unequal. 



SPECIFIC CHARACTER. 



Shell erect, subconic, aperture quadrangular, operculum or lid acute, 



and striated transversely. 



Lepas Borealis ; testa erecta subconica, apertura quadrangular! 



operculis acutis transversim striatis. 



A few small clusters, with some single specimens of this curious 

 species of Lepas, were discovered about three years since, attached 

 to the bottom of the Warspight ship of war, when taken into dock to 

 be repaired, after lying in the harbour of Portsmouth for a great length 

 of time. Mr. James Hay, of Portsmouth, has since found two or 

 three shells of the same kind, by dredging in Portsmouth harbour ; 

 so that though probably not indigenous, it has now become a na- 

 turalised species. 



This was first communicated by J. Laskey, Esq. We have 

 since received it from Newfoundland, affixed to the valve of 



e 2 



