202 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



by small, more or less oblong plates, which become very small toward 

 the margin ; each bears a spine, which toward the mouth are rather long 

 and acute, gradually becoming shorter, flatter, and blunter toward the 

 margin, near which they are spatulate, but close to the margin they be- 

 come very small and slender. The adambulacral plates are transversely 

 elongated ; each usually bears four spines, the two inner small, slender, 

 acute, the innermost the smaller, and two outer much larger and stouter 

 ones, the outermost nsually the largest, flattened and often slit or chan- 

 neled at the end. The disk-perforations are large, rounded, with a 

 smooth rim, and not surrounded by special spines. Jaw-plates promi- 

 nent, each bearing at the oral end two or three long, acute spines, and 

 others on the npper surface, while on the lateral margin a row of six or 

 eight smaller, slender spinules, usually with a second row behind them, 

 of fewer spines. Ambulacral snckers and pores large, arranged in two 

 alternating rows on each side of the median line ; the grooves are broad 

 and deep. 



Color of specimens recently preserved in alcohol, deep orange-red 

 above, yellowish -white beneath. The surface is covered with a soft, thin, 

 mucous layer. Greatest diameter of the largest specimen, 112™™; lesser 

 or interradial diameter, 100"""; breadth of larger dorsal plates, 9™-" to 

 II'"'" ; length of longest adambulacral spines, 8""°" to O-"'". A smaller 

 one has the greater radius Co™™ ; lesser, 55™™ ; breadth of larger dorsal 

 plates, G™™; length of largest adambulacral spines, 4™™ to 5™™; of inner 

 ones, 1™™. 



This remarkable new starfish has hitherto been obtained only by the 

 Gloucester halibut fishermen, who have presented three specimens to 

 the U. S. Fish Commission. The first specimen was taken by Capt. 

 Charles Anderson and crew, of the schooner "Alice G. Wunson," in 250 

 fathoms, off George^s Bank, X. lat. 42° 08', W. long. 05° 31', April 28, 

 1879. The largest specimen was taken by Capt. Thomas Olson and 

 crew, of the shooner " Epes Tarr," in 150 fathoms, N. lat. 47° 00', W. 

 long. 580 15'. Another specimen was taken in 220 fathoms, by Captain 

 Kilpatrick and crew, of the schooner "Polar Wave," in N. lat. 44° 32', 

 W. long. 570 09'. 



Porania spinulosa, sp. uov. 



Greater radius, 40™™; lesser radius, 23™™. Whole upper surface cov- 

 ered with fine, sharp spinules. Pores on the dorsal surface very nu- 

 merous, arranged in irregular groups of 6 to 15 or more, over the whole 

 upper surface of the disk and rays, and in a marginal series between 

 the upper and lower marginal plates. Lower marginal plates with a 

 group of ten to twelve sharp spinules, in two or more rows on each 

 plate. Lower surface with large, oblong, flat i)late8, separated by rad- 

 ial grooves, and bearing at their outer ends a row of two or three small, 

 appressed spines ; their sui'face bearing scattered, small, sharp gran- 

 ules. Adambulacral spines sharp, in several rows; two inner ones 



