406 



BRITISH SPECIES OF BEROE. 



■ The last species which has a claim to a place in 

 the British Fauna is the Beroe pileus of natura- 

 lists. The late George Montagu, Esq. in a letter 

 to me, dated 2 2d November 1812, says, " I have 

 lately added Beroe pileus to the British Fauna." 

 My friend, Dr Leach, who subsequently met with 

 the same animal, sent me, last year, an outline di aw- 

 ing of its form. It differs very remarkably from the 

 others already described, in possessing two long, 

 flexible, ciliated ten taenia. 



This species is figured and described by Baster, 

 in the work quoted above, vol. i. p. 124. tab. xiv. 

 %. 6. ; and by Scoresby, in his " Arctic Regions," 

 vol. i. p. 549. tab. xvi. fig. 4. It is true, that these 

 figures do not bear a very close resemblance ; but 

 when we consider the mutability of its forms, we 

 can scarcely expect an agreement in the representa- 

 tions given of it by different authors. 



The necessity of separating the species with long 

 ciliated tentacula, from such as are destitute of these 

 organs, and forming them into a separate genus, ap- 

 pears to be generally acknowledged ; and if no other 

 term has been proposed to designate the new cate- 

 gory, Pleuro-brachia may be adopted. 



Manse of Flisjc, 

 August 1820. 



