<0 



SERTULARIA, 



form a beautiful little grove-like figure of this animah 

 This moft elegant fpecimen I have preferved in fpirits. 



The figure of this animal, without its ovaries, was- 

 drawn by Mr. Ehret, in June 1754, at Brighthelmftone,. 

 and is reprefented in the Philofophical Tranfa&ions, 

 Vol.48, tab. 22. No. 1. A. to fhew the medullary part 

 of this animal in the ftem, united to the feveral heads in 

 their cup-like denticles. This is a molt exact figure of 

 one ot thofe on the Afcidia before mentioned, when: 

 viewed through the microfcope in fea-water. The figure 

 at tab. 12. fig. B. EfTay on Corallines, has the ovaries^ 

 but not the cup-fhaped denticles : this was taken from a 

 dried fpecimen, where the joints are very much fhrunk, fa 

 as to look knotty. 



2 1 . Sertularia verticillata. 



Horfe-tall Coralline, 



Sertularia fubramofa y 



deniiculis campanulatis 

 pedtmculatis margin e den- 

 tatis fubereElis verticilla- 

 tifque, ovariis ovato-tu- 

 bulojis. 



This Coralline is loofely 

 branched ; the denticles are 

 bell-fliaped, indented on the 

 margin, fit on foot-ftalks, and 

 are placed in whirls at regular 

 diftances round the flem. The 

 ovaries are egg-fhaped, and 

 end in a tube. 



Horfc-tail Coralline with bell-fiaped cups. Ellis Coral- 

 lin. pag. 23. tab. 13. No. 20. fig. a. A. 



Sertularia verticillata. Linn. Syft. Nat. Ed. 1 2. p. 1 3 1 o. 



Since I publiflied my EfTay on Corallines, I have met 

 with fome fpccimens, with their ovaries, which were oi 

 an oval figure, ending in a tubular mouth. 



This Coralline is remarkably tender and brittle, and 

 the bell-fliaped denticles are fo glutinous, that it is very 



difficult 



