Ona new Starfish and new Britile Stars. PLEA 
XV.—One new Starfish and Five new Brittle Stars from 
the Galapagos Islands*. By Austin H. Cuark. 
Freyella scalaris, sp. n. 
Fourteen or fifteen arms; R=about 150 mm.; diameter 
of disk 18 mm. to 22 mm.; diameter of elevated portion of 
disk 15 mm. to 19 mm. ; length of genital region twice the 
diameter of the disk ; diameter of ray at base 5 mm. ; 
diameter of ray at widest part of genital inflation (15 mm. 
from the base) 6 mm. 
The edge of the disk is circular, with slight indications of 
lobes on the arm-bases. ‘The abactinal membrane is very — 
tight, covered with very small and numerous thin and 
delicate plates which are thickly beset with very small and 
fine evenly spaced spinules, each entirely encased in a 
membranous sheath ; there are a few longer spinules about 
the anal opening. 
The madreporite is small, subcircular, situated on the 
border of the raised portion of the disk, surrounded by 
numerous spinelets, which form a rather large patch on the 
adcentral side. 
The interradial plates, which are confined to the side-wall 
of the disk, are high and narrow, nearly twice as high as 
broad, inconspicuous. 
The rays are very long, narrow, tapering gradually, only 
shghtly narrower at the base than throughout the very 
extensive genital region, which is not inflated ; they are 
subeylindrical at the base, and are little or not at all depressed 
on the genital region. 
The genital region extends along the arm for a distance 
equal to twice the diameter of the disk. From the base of 
the rays to the distal border of the genital region the abacti- 
nal surface of the arms is covered, and completely enclosed, 
by rounded-quadrate irregularly imbricating plates, arranged 
in fairly regular transverse rows. Across the arm in the 
ceutre of the plates composing each of these rows there runs 
a regular baud of small spines, which are more than twice as 
long as the spines on the disk and mostly or entirely naked. 
At the arm-tjases these rows are closely crowded and the 
spines are relatively small, but they rapidly become more 
spaced and the spines increase in length; over the genital 
region from fifty-five to sixty of these prominent spiniferous 
* Published with the permission of the Secretary of the Smithsonian 
Institution, 
ge 
