(J8 ASTEROTDEA. 



i. Off Achill Head, 500 fms. Royal Dublin Soc. 



/, k. Off West coast, Ireland, 250 fms. 

 I, m. Off West coast, Ireland, 315 frns. 

 n. Off West coast, Ireland, (?) fms. 

 o. SAY. coast, Ireland, 1000 fms. 

 p-t. Off South Sound, 20-25 fms. R. Irish Acad. 



u-x. Off the Skelligs, 90 fms. R, Irish Acad. 



y-V. Blackrock Bay. R- Irish Acad. 



c'. Galway Bay, 15 fms. R. Dublin Soc. 



d'. 40 miles off Bolus Head, 115 fms. R. Dublin Soc. 



e'-q'. Kenmare River. 



h'-k'. Newcastle, co. Down. Belfast Nat, Hist. Soc. 



V, m'. Portaferry, Strangford Lough. Belfast Nat. Hist. Soc. 



n', o'. Coast of Ireland. Earl of Enniskillen. 



p', q'. Off Liverpool. 

 r'-t'. Plymouth. 



«', v'. Cullercoats, Nov. 1890. R. Howse, Esq. 



w'-z'. Montrose. July 16/18, 1890. W. Duncan, Esq. 



a", b". Outer Haaf, Shetland, 80-100 fms. Rev. Canon Norman. 



2. Astropecten sphenoplax. (Plate XI.) 



Astropecten sphenoplax, Bell, Proc. B. Dull. Soc. vii. (1892) p. 522, 

 pi. xxiii. 



R nearly equal to 5 r ; breadth of arm at base equal to diameter 

 of disk. Marginal plates about 30, the lower sharply cut at their 

 free edge so as to be wedge-shaped or to leave a gap between each 

 plate. No spines on the superomarginals, or a few scattered spines, 

 or prominent spines are pretty regularly developed from the angle 

 to the middle of the arm, one on each plate, and more distally there 

 are distinct spinous tubercles. The arms taper rather rapidly, and 

 near the tip the whole of the dorsal surface is occupied by the 

 superomarginals. The adambulacral plates are rather closely 

 covered by fine spines arranged in two or more definite rows, or in 

 two definite rows and the remainder more irregular. About ten 

 spines at the sides of the inferomarginals, some of which are so 

 long as to extend beyond the hinder edge of the plate next in front, 

 and some of which are quite short. Madreporite quite close to a 

 superomarginal. 



Colour, in spirit, straw to brown. 



R = 52 ; 51 ; 49. r = 11-5 ; 11 ; 11-5. 



a-e. 45 miles off Blackrock (N.N.W. of Achill J 



Island), 500 fms. \ Royal Dublin Soc. 



Only known locality. I 



3. PSILASTER. 



Psilaster, Sladen, Chall, Nat: i. (1885) p. 611 ; id, Chall. Rep. Ast. 

 (1889) p. 221. 



An Astropectinine in which there is no marginal fringe ; the 



