THE IRISH SEA. 123 



2. STELLONIA GLACIALIS.* 



In this species, which is common in the Irish Sea, the rays are 

 pentangular, the angles bearing rows of large produced spines, 

 which arise from tubercles thickly studded with small spines. The 

 disk is more strongly marked than in Stellonia rubens, and the rays 

 do not taper so gradually. A specimen in the collection of Mr Wal- 

 lace was of a bright red colour when taken. This is the star-fish I 

 described at the Liverpool Meeting of the British Association as 

 Asterias spinosus. 



3. Stellonia hispida.+ 



A small species, having short broad rays, as long as the breadth of 

 the disk; the surfaces covered with numerous spines, which are 

 generally simple. An inch broad. Found at Castletown, Isle of 

 Man, by Dr Coldstream. I have taken it in the Hebrides, adhering 

 to stones at low water. 



VIII. LUIDIA, Forbes. — Body stellate; rays flat, 

 covered above with spiniferous tubercles ; avenues border- 

 ed by two sets of spines ; suckers biserial. — PL III. Fig. 8. 



1. LUIDIA FRAGILISS1MA. — Forhes.% 



Rays seven, flat, five times as long as disk, covered (as well as the 

 disk) with tubercles, each bearing a radiating circle of from six to 

 eight sub-clavate papillose spines, generally with from one to three 

 short clavate spines in the centre. Border of the avenues formed of 

 an inner row of four or five long thick sub-clavate spines, placed in re- 

 gular transverse ridges, which are covered with small slender spines ; 

 innermost spines thickest, and forming a fringe to the flattened arms, 

 and of an outer or under row of long, slender, angular spines, also 

 placed in transverse ridges, two rows of very long suckers in each 

 avenue. Madriporiform tubercle extremely lateral, almost marginal, 

 reticularly striate. Above dark red, beneath straw colour. Mea- 

 sures two feet across. 



• Link, t. 38 and 39. Asterias angulosa, Mull. Zool. Dan. ii. p. 1, t. 41. 

 Asterias glacialis, Linn. ; Lam. p. 861, No. 26. Asterias echinophora, Delia 

 Chiagi Mem. vol. ii. p. 356, pi. 18, f. 5. 



+ Asterias hispida, Pennant, vol. iv. t. xxx. fig. 58; Link, pi. 9, fig. 19; 

 and pi. 35, fig. 39. 

 + Asterias rubens, Johnston, Mag. Nat. Hist. v. ix. p. 144. fig. 20. 



