UNGTHORN. 



135 



ASTER J AD. E. 



ASTER 1 JE. 



Genus Luidia. Forbes. 



Generic Character.— Body stellate ; rays flat, covered above with spiniferous 

 tubercles ; avenues bordered by two sets of spines ; suckers biserial. 



THE LINGTHORN. 



Luidia fragillissima. Forbes. 



Luidia fragillissima, Forbes, Wern. Mem. VIII. p. 123. 



Asterias rubens, Johnston, Mag. Nat. Hist. vol. IX. p. 144, fig. 20. 



Asterias pectinata, Couch, Mag. Nat. Hist. New Series, Jan. 1840. 



In my Memoir on the Asteriadse of the Irish Sea, pub- 

 lished in the Wernerian Memoirs for 1839, I constituted 



