4 



by the conflant motion of the feelers or tentacula of the 

 Tnton inhabiting the fhell. 



For this dilcovery the Conchologift is indebted to the 

 late Mr. Bryer, of Weymouth, who found feveralof thefe 

 non-defcript fhells on Portland reach, fome of which were 

 recent, containing the animals. 



This gentleman remarked, when he favoured us with 

 fpecimens, that although he had often found the fame 

 fponge in the bay of Weymouth, he never btfore obferved 

 it to be inhabited by tliis (hell, whence he concluded it to be 

 a pelagk produ6lion ; probably it is a very rare fpecies, for 

 it never occurred to us on the coaft of Dezwi, where the 

 f]X)nge is by no means uncommon. 



In a piece of the fame fpecies of fponge from the coafi of 

 Devoji we found another Balaniis, apparently belonging to 

 the family of B. fpojigeofus, but being mutilated the upper 

 valve could not be afcertained : the cup or bafo, an inverted 

 cone, perforated at the lower or fmalier end, is extremely 

 thick, and the margin of the cup bevelled off to an edge, 

 which is flriated ; the infide is furnifhed with annular 

 ridges, and lined with a membrane ; the outfide is rough 

 with tubercles, and broad proje61ing plates or lamince. 



LEPAS. 



