110 BRISINGIDAE. 
Examination of the rays shows that there is no evidence of a syzygy at the 
base: all of them are still attached to the disk, though broken at,a greater or 
less distance from it. The arrangement of marginal, adambulacral, and oral 
plates about the mouth seems to be like that of Freyellidea microplaz, the geno- 
type. There is a single genital gland on each side of the swollen area at base of 
ray. The combination of characters which serves to separate this species from 
all those previously known lies in the very long, slender arms, the unusually 
short inferomarginal and adambulacral ‘spines, and the extraordinary oral 
spinelets. 
Freyellidea octoradiata,' sp. nov. 
Plate 6, fig. 1, 2. 
Rays 8. Disk 16 mm. across. Rays about 185 mm. long or perhaps more 
(the tips are missing). R = about 12d. Disk high and slightly tumid, closely 
covered with thick overlapping plates, a millimeter across, more or less; in each 
interradius, the large interradial plate is conspicuous, occupying the whole side 
of the disk in those areas; interradial plates smooth and bare, but all other disk- 
plates with several (usually three or four) small, slender spines and rarely one 
or two pedicellariae; the latter are nearly always on plates near arm-bases; 
spinelets about .50 mm. long, with blunt and often slightly swollen tips. Rays 
rather stout, about 5.5 mm. wide at base and 3 mm. wide near middle; genital 
area about 35 mm. long and 8 mm. wide, where widest. Basal fourth of ray 
more or less covered with spiniferous plates, similar to those of the disk but larger 
and carrying more spinelets and pedicellariae; as far out as the genital area 
extends, these plates are close together and cover the region completely but 
beyond that point they become more and more separated, fewer in number 
and smaller in size, until they finally disappear as very minute fragments carry- 
ing a single pedicellaria; on the genital area the plates are, as a rule, much wider 
than long, and the largest exceed 2 mm. in breadth; near tip, pedicellariae- 
covered skin clothes dorsal and lateral parts of ray. 
Adambulacral plates rather short and stout, nearly cylindrical; thickness 
more than half length; inner, aboral peak present but slender; armature as 
usual in the genus; a short spinelet on the peak, extending across furrow and 
carrying small pedicellariae; and a large actinal spinelet, the tubercle of which 
occupies a large part of distal half of plate; near base of arm, these actinal spine- 
lets are very stout with enormously widened flat, dentate tips, as in F. insignis 
‘ octoradiatus = having eight rays, in reference to the unusually small number of arms. 
