LTTIDIA. 71 



Luidia fragilissima, Forbes, Mem. Wern. Soc. viii. (1839) p. 123, 

 pi. iii. tig. 8 (pars) ; id, Brit. Star/. (1841) p. 135 (pars) ; Mail- 

 land, Faun. Belg. Sept. (1851) p. 88; Thompson, Nat. Hist. Irel. 

 iv. (1856) p. 441. 



Asterias pectinata, Couch, Mag. Nat. Hist. iv. (1840) p. 34. 



Luidia P ciliaris, Gray, Ann. 8f Mag. vi. (1840) p. 183. 



Luidia ciliaris, Duj. fy Hup. Echin, (1862) p. 433 (pars) ; Terr. Ann. 

 Sci. Nat. xii. (1869) p. 300, pi. 18. fig. 17 ; Fischer, Act. Soc. 

 Linn. Bordeaux, xxvii. (1872) p. 363 ; Pen-. Arch. Zool. exper. v. 

 (1876) p. 262 ; Ludw. Mitth. zool, Stat. Neap. i. (1879) p. 544 ; 

 Sladen, Chall. Rep. Ast. (1889) p. 254. 



Asterias iruperati, Delle Ch. Descr. An. Sic. cit. iv. (1841) p. 57. 



Luidia savignii, M. Tr. Sust. Ast. (1842) p. 77 (pars) ; Dub. $ Kor. 

 Vet.-Akad. Hdlg. 1844 (1846), p. 254 (pars) ; Sars, Norg. Ech. 

 (1861) p. 26 ; Norm. Ann. § Mag. xv. (1865) p. 117 ; Heller, 

 Zooph, u. Ech. Adriat. Meer. (1868) p. 55 ; Scott, Proc. Roy. Phys. 

 Soc. Edin. 1890-1 (1892), p. 82. 



R, = 5 r to 7 r (about). 



Hays seven or eight, long, well marked off from the disk, tapering 

 very slightly, so that the sides are almost parallel till quite close to 

 the end, which is wedge-shaped and very fragile. Ambulacra wide, 

 bounded by one row of small delicate, and an outer row of longer 

 and stronger spines : in both sets the neighbouring spines are rather 

 widely separated from one another. Beyond the adambulacral 

 plat°s is a row of respiratory pores, which are immediately succeeded 

 by the inferomarginals, carrying a row of three or four, as well as a 

 number of small, but closely packed, rather delicate spines. Paxilloe 

 of upper surface numerous, regular, stellate above. Madreporite 

 small, obscure, near edge of disk. Pedicellariae trivalve, very broad, 

 arranged regularly on either side of adambulacral ossicles. 



Colour of spirit-specimens faded yellow to brownish, lighter below, 

 sometimes with darker patches ; dry, more or less orange, darker 

 alongside the arms, below lighter to greyish. 



Distribution. Eastern side of Atlantic from Faeroe to Cape Verde ; 

 Mediterranean. To 87 fms. 



a. Arrau. W. C. Trevelyan, Esq. 



b, c. S.W. coast of Ireland, 55 fins. 



d. Kenmare River. 

 e,f. Isle of Man. Prof. E. Forbes. 



* The arms of one and the same specimen, even when uninjured, are not all 

 of the same length. 



