1894, PBOCEEBLNGS OF THE NATIONAL MUSEUM. 283 



spines, in alcoholic specimens, are covered with a loose sacculated 

 integument, which is densely covered with minute, crossed pedicellariaB. 

 The ambulacral feet are large with well developed terminal suckers; 

 each one is usually separated from the next in the same row by two 

 transverse furrow-spines, but frequently only one of these is developed. 



A good sized specimen in alcohol has the radius of the disk, 14 mm.; 

 length of the longest remaining ray, which is broken at some distance 

 from end, 220mm.; breadth of the rays at base, 6 mm.; at the widest 

 part, 8 mm.; length of the disk-spines, 1 to 1.5 mm.; length of longest 

 arm-spines, 14 mm. 



Taken in 1885, at station 2573, off George's Bank, in 1,742 fathoms, 

 3 specimens (No. 12074, U. S. X. M.); also in 1880, at station 2085, off 

 Martha's Vineyard, in 1,137 fathoms, 1 specimen (No. 14858, U. S. N. M.). 



BRISINGA VERTICILLATA, Sladeu. 



Brisinga verficillata, Sladex, Voyage of the Challenger, xxx, p. 604, pi. 109, figs. 

 9-11, 1889. 



A number of disks and loose arms have been taken off our coast, from 

 N. lat. 41° 13', W. long. 00° 50", to K. lat. 30° 34', W. long, 73° 48', 

 in 900 to 1,374 fathoms. 



FREYELLA ELEGANS (Verrill) Sladen. 



Brisinga eleaans, Verrill, Amer. Journ. Science, xxviii, p. 38L', 1884. 

 Freyella hractiata, Sladen, Voyage of the Challenger, xxx, p. 629, pi. 114, figs. 

 1-4, 1889. 



Bays nine to fourteen, but in the majority of specimens twelve, very 

 long and slender, with the reproductive region considerably prolonged 

 and only slightly swollen. Radii as 1 to 30+. Diameter of the disk of a 

 large specimen, about 25 mm. Disk small with rather acute interradial 

 notches. The surface is densely covered with small, unequal, somewhat 

 imbricated plates, most of which are rounded in outline, while others 

 are angular; all have an elevated, conical, central tubercle, and bear 

 from one to three, or four, small sharp spines, much the greater num- 

 ber having only one spine. Madreporic plate close to the margin, 

 prominent, with few deep grooves separated by broad ridges. Inter- 

 radial ijlates not distinct, dorsal pore nearly central, usually very dis- 

 tinct and surrounded by a group of small spinules, borne on small angu- 

 lar plates somewhat smaller than those on the rest of the disk. The 

 spinules of the disk are numerous and uniform in size, so that it appears 

 to the naked eye rather closely and evenly spiuulated. Numerous small, 

 delicate pedicellariae are usually scattered over the disk between the 

 spines and around their bases, but in some specimens these are mostly 

 wanting. The ijeristome is very large and the buccal membrane is 

 smooth and delicate. The Jaws are rather narrow, longer than broad, 

 with prominent inner and outer angles with incurved sides and a distinct 

 median suture; each half bears two transversely directed spines, one 

 at the extreme inner and the other at the outer angle of the furrow; 



