53. WRIOHTELLA. 31 



opposite or alternate, diverging at nearly right angles, often sinuous, 

 inosculating, uniting the diverging parallel branches into an irre- 

 gular network. Bark, when dry, very thin, almost membranaceous, 

 smooth, and slightly wrinkled. Polype-cells on all sides of the 

 branchlets, alternatp or opposite, cylindrical, short, smooth exter- 

 nally, with a convex 8-valved top. Axis very slender, thread-like, 

 except the main stems, calcareous, hard, pale horn-colour, very 

 brittle. 



Brandella, Gray, Ann. fy Mag. Nat. Hist. 1869, iii. p. 22. 



123. BrandeUa intricata. B.M. 



Coral fan-shaped, expanded. Stem very irregular ; branches and 

 branchlets regularly pinnately disposed, forming an irregular net- 

 work ; some of the uppermost branchlets free. 



Raynerella aurantia, Gray, 1. c. p. 22. 

 Hab. Bass's Strait, Dewi Reef (T. M. Rayner}. 



52. VERRUCELLA. 



Coral much branched ; branches free. Bark rather thick, smooth, 

 spongy, and granular within. Polype-cells wart-like, very promi- 

 nent on the edges of the branches. Lateral line smooth, narrow. 

 Axis calcareous, branched, white. 



Verrucella, 2, Milne-Edw. $ Haime, Corall i. p. 184 ; Kolliker, Ic. 



Hist. p. 140. 

 Gorgonella, sp., Valenc. Comptes Rendus, xli. p. 14. 



124. Verrucella guadalupensis. 



Coral arborescent, fan-like ; branches diverging ; branchlets slender. 

 Bark pale yellow, granular; axis whitish. Lateral grooves very 

 narrow and deep ; polype-cells conical on the sides of the branches. 



Verrucella guadalupensis, Duchass. 8f Michel. Corall. Antilles, p. 33, 

 t. 4. f. 5, 6, Suppl. p. 114; Kolliker, Ic. Hist. p. 140, t. 14. f. 5, 6, 

 1. 19. f. 10, 11. 



Hob. Guadaloupe. 



Differs from V. violacea in the white granulations. See : 



1. Verrucella granifera, Kolliker, Ic. Hist. p. 140, 1. 19. f. 5. 

 Hob. Coast of Africa. 



2. Vemicella ramosa, Kolliker, Ic. Hist. p. 140. 

 Hob. Nine Island. 



53. WRIGHTELLA. 



Coral slender, rather compressed, furcately branched, of nearly the 

 same diameter to end, expanded in a plane ; branches slender, di- 

 verging, rather compressed. Bark white or crimson, thin, with a 



