a GORGONIA. 209. 



mous ; branches long, very narrow, and bundled ; 

 rind rather warty, with simple and oblong cells. 

 Mediterranean. 



TWIGGY. 



38. Gorgon I A sarmentosa. Branches loose, lonsr, 

 and flexible ; axe bristly ; rind cretaceous, and thickly 

 covered with papillous or projecting polypi ; co- 

 lour, an orange yellow; height from four to five 

 decimetres . 



Found in the Mediterranean, and chiefly near the 

 islands of Ivica and Formentera. 



PUSTULOUS. 



39. GoRGONiA pustulosa. Branching ; the principal 

 branches, as well as the smaller ones, dispersed ; polypi 

 placed at the summit of conical and pustulous excres- 

 cences, which are divided in two almost lateral ranges 

 by a small slightly projecting line ; rind of a bright 

 red ; axe cylindrical ; height from two to three de- 

 cimetres. — Plate 15. 



PURPLE. 



40. GoRGONiA purpurea. Almost dichotomous ; 

 branches slender ; polypi warty. 



American seas. 



KNOTTED. 



41. GoRGONiA nodulifera. Branches marked with 

 small alternate knots, a little distant, rounded, ap- 

 pearing spongy, and formed by polypous cells ; rind 

 an orange yellow ; height from fifteen to sixteen cen- 

 timetres. 



Cor, ' 2 j^ 



