SERTULAEIA. 137 



Hab. Cornwall, Mr. Couch; Scarborough, Mr. Bean; 

 Frith of Forth, Jameson; Cork Bay, J. V. Thompson; 

 Magilligan Strand, Templeton; Dublin Bay, Hassall; 

 rare in Cornwall, plentiful in Devon and Norfolk, C. W. 

 Peach; Mersey, Mr. Tudor; Dublin Bay, Dr. Scouler. 



This is a stouter polypidom than the preceding, though 

 it does not rise to so great a height ; the branches, how- 

 ever, are larger and more fan-shaped, bending gracefully as 

 if laden with a rich cup of vesicles, arranged in close order 

 on the upper side of the branches. The vesicles are oval, 

 and smooth. 



This, though exceedingly beautiful also, is rather coarser 

 and less elegant in appearance than the preceding, unless 

 the specimen be more than usually fine. 



It still remains undetermined whether they be really two 

 distinct species. Ellis thought them distinct species ; Mr. 

 Hassall points out what he thinks sure marks of distinction. 

 J. V. Thompson and Mr. Bean consider them distinct. 

 Pallas, and Linnaeus after him, regard them as one species. 

 Sir J. G. Dalyel), Dr. Fleming, and Dr. Johnston seem to 

 have doubts as to their being different species, and we are 

 disposed, along with Mr. W. Thompson, to think that they 

 run into each other. 



