S E R T U L A R I A. 43 



In the center of the frontifpiece to my EfTay on Coral- 

 lines I have given a figure of this beautiful Coralline, 

 as it appears alive in the fea. The figure in tab. 7. was 

 drawn from a dried fpecimen. 



12. Sertularia Pluma. Podded Coralline, 



Sertularia denticulis fe- This Coralline has bell- 



cundis imbrkatis campa- ihaped denticles, lying clofe 



nulatis^ ovariis gibbis cri- above one another ; the ova- 



Jlatisy fur cults pinnatis Ian- ries are gibbous and crefted ; 



ceolatis alternis. the little fprigs rife alternately, 



and are pinnated. 



"The Podded Coralline. Ellis Corallin. p. 13. tab. 7, 

 No. 12. fig. b. B. 



Sertularia Pluma. Linn. Syft. Nat. Ed. 12. pag. 1309. 



This neat feathered Coralline is generally found climb- 

 ing up, and furrounding fucus's, particularly the podded 

 Fucus. Its little tubuious radicles are difpofed in circles 

 round the ftem of the Fucus in fuch a manner, by uni- 

 ting together, that the force of the fea cannot feparate 

 it without tearing the Fucus to pieces. The fide branches 

 thatfupport the denticles are jointed ; and the denticles, 

 whofe margins are ferrated, are fupported in the front of 

 each by a little projecting hollow fpine, which, in the 

 Sertularia Pennatula, one of this tribe, is longer and more 

 diftincl-, but cut off at the end, as will appear in tab. 7. 

 fig* 1. 2. This little fpine does not appear in our figure, 

 on accpunt of the painter's drawing the Coralline from an 

 oblique back view of the branches. See the figure in 

 Eflay on Corallines, tab. 7. The pods or ovaries have: 

 generally five criftated ribs, pointing obliquely upwards, 



G 2 and 



