72 ASTEE01DEA. 



g. Oyster-beds, oft' Stackpole Head, Jan. 1889. 



h. Cornwall. 



i. Polperro. 



j. Falmouth. W. P. Cocks, Esq. 



k. Plymouth. Prof. Stewart. 



I. Plymouth. 



m, n. Berwick. Dr. G. Johnston. 



o. Shetland Islands. E. M. Nelson, Esq. 



2. Luidia sarsi. 



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



Brit. Starf. (1841) p. 135 (pars). 

 Luidia sarsii, Diib. § Kor. (Efv. Vet.-Akad, Fork. 1844 (1845), 



p. 113 ; Sars, Nyt Mag. x. (1859) p. 46 ; id, Norg. Ech. (1861) p. 25 ; 



Norm. Ann. $ Mag. xv. (1865) p. 118 ; Hodge, Trans. North. § 



Durh. iv. (1872) p. 134 ; Ban. 8f Kor. Norske Nordhavs Ast. 



(1884) p. 94; Sladen, Chall. Rep. Ast, (1889) p. 258; Scott, 



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

 Luidia savignii, Dub. $ Kor. Vet. -Ah. Hdlg. 1844 (1846) p. 254 



(pars). 



R = 5 r (nearly). 



Five arms, not very long, tapering rather rapidly, so that they 

 have the form of elongated triangles, rather but not very fragile. 

 Ambulacra wide, bordered by three rows of spines, of which the 

 median is the larger, while the innermost is directed towards the 

 groove ; there is a row of respiratory pores followed by infero- 

 marginals as in L. cUiaris, the three or four large spines carried 

 by which are proportionately and the smaller spines are absolutely 

 larger than in the other species ; the rays of the stellate heads of 

 the paxillaB are also longer, and one ray often forms a projecting 

 spine. Madreporite small, obscure, marginal. Pedicellarise rare, 

 small, papilliform. 



Colour, in spirit or dry, white. 



Distribution. Eastern side of Atlantic from Norway to Cape Verde. 

 To 374 fma. 



a-c. Between Scotland ond Faerce Banks, ' Porcupine ' Exp. (St. 46). 



374 fins. 



d-f. Off Island of North Bona, 33 fms. 'Knight Errant' Exp. (St. 3). 



g-j. East of Shetland Islands, 64 and ' Porcupine r Exp. (Sts. 67 & 



75 fms. 68). 



k, I. Outside Valentia. R. Irish Acad. 



m. Donegal Bay, 33-37 fms. R. Irish Acad. 



The arms of the same specimen may differ a little in length. 



