S E R T U L A R I A.- 4 r 



fome days by renewing the water ; we may then cut off 

 fmall pieces, and put them in a watch-glafs full of fea- water, 

 and in a little time they may be examined in the aquatic 

 microfcope. See the figure in the Phil. Tranf. Vol. 48. 

 tab. 23. fig. b. F. F. where it is mod exactly reprefented, 

 as it appeared alive. This to perfons not acquainted with 

 the nature of Zoophytes will appear a molt, furprizing as 

 well as a moft agreeable fcene of entertainment, as I have 

 frequently experienced with perfons, who have accompa- 

 nied me to the fea fide : the propereft and moft portable 

 microfcope for this purpofe I have given a very good figure 

 of in my ErTay on Corallines. 



9. Sertularia Thuja. , Eottle-brujh Coralline. 



Sertularia denticulis di- This Coralline has two rows 



Jlichis alternis apprejjis, of denticles, clofely adhering 

 ovariis ovatis marginatis^ alternately to both fides of the 

 ca-ule a?tgulato rigido pani- branches. The ovaries are 

 cuiatO) ramulis creherrimis oval, with a margin or rim; 

 dkhotomis attenuath. about their openings. The 



ftem is waved and very ftiff: 

 on the upper-part is a tuft of 

 dichotomous little branches, 

 which grow fmaller at the: 

 ends. 



Sibbald Scot. Illuftr. tab. 12. 



Botlle-brufh Coralline. Ellis Corallin. pag. 10. tab, 5, 

 No. 9. fig. b. B. and in the frontifpiece. 



Sertularia Thuja. Linn. Syft.. Nat. Ed. 12. p.. 1308.. . 



G 10. Sertularia 



