222 ME. W. PERCZ SLABEN ON THE 



Station 46. Lat. 40" 17' N., long. 66= 48' W. Depth 1350 fms. ; 

 bottom temperature 2°'3 C. ; mud. 



Station 47. Lat. 41° 15' N., long. 65° 45' W. Depth 1340 fms. ; 

 mud. 



POECELLANASTER CAFLIPEB, n. Sp. 



Eays five, moderately long and slender, not much broader at 

 the base than at midarm, tapering only slightly. Interbrachial 

 angles rather flatly rounded ; the lesser radius in the proportion 

 of 30 per cent.; i2 = 21 millim., r = 6-5 millim. Disk high, 

 gibbous, and much inflated. Dorsal area covered with an integu- 

 ment, beset with spinelets, excepting at the very base of the 

 rays. The spinelets are simple, delicate, clavate or thickened at 

 the extremity, covered with membrane, and rather widely spaced. 

 Large papulae-like bodies are interspersed here and there. 

 Tubular epiproctal prolongation very long, nearly equal to the 

 lesser radius, rather narrow and tapering towards the extremity. 



Marginal plates moderately high, forming a perpendicular wall 

 in the interbrachial angle, but arching over on the dorsal surface 

 of the rays, and leave only a narrow space along the median line 

 between the corresponding plates of either side. The supero- 

 marginal series are seven in number, exclusive of the terminal ; 

 all are longer than high, and each carries a long, delicate, acicular 

 spinelet. The terminal plate is large and elongate, very slightly 

 prominent dorsally, and flattened; and normally carries three 

 spinelets, though sometimes more are present. These are longer 

 than the spinelets on the other supero-marginal plates and are 

 delicate and acicular ; one is placed above the termiaation of 

 the ambulacral furrow, and one on either side a little beneath. 

 Occasionally one or both of these lateral spines may be reduplified, 

 thus producing the additional number. The infero-marginal 

 plates correspond in number and length with the superior 

 series, and are, like them, longer than high ; they do not curve 

 round on the actinal surface of the ray, which is flat. Cribriform 

 organs, one in each angle, very broad, well defined, and with a 

 deep depression down the median line ; structure lamelliform. 



Ambulacral furrows broad, open, and straight. Adambulacral 

 plates small, rather elongate in the direction of the ray and rather 

 widely separate. The margin towards the furrow is incurved, 

 and the adoral extremity is somewhat scooped out and lias the 

 margin slightly lipped, the aboral extremity of the next plate 



