80 



ASTEROIDEA. 



a. Off Island of North Bona. 



b-cl. Lamlash Bay. 



e,f. Arran. 



g, h. Between Arran and Ailsa Craig, 28 fins. 



i-l. Kilbrennan Sound, 10-20 fms. 

 m-p. 4 miles S.E. of Sanda Island, 30-35 fms. 

 q. Scotland. 

 r. Off West coast of Ireland, 53° 15' N., 



11° 51' W., 106 fms. 

 s. Off Valentia. 



t. Killybeg Harbour, 14-16 fms. 

 u. Davalaun, 30 fms. 

 v. OffBallycottin. 

 to. Youghal. 

 x-z. Off Liverpool. 

 a'. Tenby. 

 V . Falmouth. 

 c', d'. Plymouth. 

 e'. Boss-shire. 

 /'. British Seas. 



' Knigh t Errant ' Exp. 



(St. 7). 

 Prof. Herdman. 

 Dr. Leach. 

 John Murray, Esq. 

 John Murray, Esq. 

 John Murray, Esq. 



' Porcupine 'Exp. 



(St. 8). 

 1 Lightning ' Exp. 

 R. Dublin Soc. 

 R. Dublin Soc. 

 R. Irish Acad. 

 Belfast Nat. Hist. Soc. 



Dr. P. Cocks. 

 Dr. Sutherland. 



2. EHEGASTER*. 



Rhegaster, Sladen. Trans. Roy. Soc. Ed. xxxii. (1883) p. 155 ; id. 

 Chall. Rep. Ast. (1889) p. 367. 



A Gymnasterid in which the marginal plates carry spines, but in 

 which there is no row of spines along the middle line of each ray. 

 The plates of the dorsal surface are closely covered with fine spines, 

 but there is no marginal fringe. 



1. Rhegaster mnrrayi. 



Rhegaster murrayi, Sladen, Trans. R. Soc. Ed. xxxii. (1883) p. 156, 

 pi. xxvi. figs. 2-7 ; id. Chall Rep. Ast. (1889) p. 368. 



E = 1'3t, 



According to Mr. Sladen this species, of which only a single 

 specimen is known, is nearly allied to B. tumidils, Stuxberg, but 

 differs in the shorter ray, the " marginal contour is distinctly 

 festooned by the inferomarginal plates, and each of these bears a 

 group of enlarged spinelets ;" the spinelets are said to be more simple 

 in character than in R. tumidus, and the papulae more numerous on 

 the lower surface. 



a. Faeroe Channel, 285-433 fms. 



' Triton ' Exp. 



* This genus, as well as "Marginaster " and Lasiaster, have been established 

 on quite immature specimens, a circumstance which probably will give rise to 

 much misconception in the future. 



