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



This moft delicate white tender Coralline is often found 

 growing on fhells, and often climbing up other Coral- 

 lines. The ends of fome of the branches turn into little 

 radicles, as if it were going to climb up other fubftances, 

 as is expreffed at fig. B. Effay on Corallines. The ova- 

 ries are moft exa&ly reprefented through the microfcope; 

 thofe that are unexpanded are in the younger ftate, and 

 in this form I have now whole branches moft beautifully 

 adorned with regular rows of them ; thofe with the points 

 flicking out appear to be in this ftate, when they have 

 difcharged their fpawn. This object affords great enter- 

 tainment in the folar microfcope, from the beautiful 

 blofibm-like appearance of its ovaries, before they are ex- 

 panded, where they look like fo many double flowers. 



8. Sertularia pumila. Sea-Oak Coralline, 



Scrtulzriadenticulis op- This Coralline has oppofite 



pofitis mucronatis recur- denticles pointed and bent 

 vatis^ ovariis fuhrotundis. back; the ovaries are roundim, 



Sea-Oak Coralline. Ellis Phil. Tranf. Vol. 48. tab. 23. 

 fig. 6. F. F. and Vol. $j. tab. 19. fig. 11. Corallin. pag. 

 9. tab. 5. No. 8. fig. a. A. 



Sertularia pumila. Linn. Syft. Nat. Ed. 12. p. 1306. 



This is met with on feveral fpecies of fucus, but of- 

 tener on the Fucus ferratus, or Sea-Oak with ferrated 

 leaves ; and, as it is often found on the fhore on the go- 

 ing out of the tide, adhering to the broad leaves of that 

 large remarkable Fucus, it affords us the more frequent 

 opportunities of feeing this animal alive, extending its 

 claws, provided it is immediately, while moift, put into 

 fome clean fea-water, In this ftate it may be kept for 



fome 



