NEW STARFISHES FROM DEEP WATER OFF CALIFORNIA AND ALASKA. 319 



nearer aboral margin than center of plate, a much stouter and longer spine (about 4 nun.), covered 

 with a rather thick membranous sheath, closely beset with pedicellarise; (3) ankylosed to the side of 

 every other adambulacral plate a small lateral plate bearing a spine about 7-9 mm. in length, which, 

 like the others, is sheathed; actinal adambulacral spine shorter on plates, opposite to which there is 

 a lateral spine. 



Actinostome 12.5 mm. in diameter; mouth plates small, the combined width of the 2 plates being 

 about equal to breadth of furrow at its mouth; plates with no conspicuous lateral processes into furrow; 

 armature consisting of ilia rather prominent, but slender and delicate, marginal spinelel situated at 

 angle between furrow and actinostomal margins; (2) on actinal surface near center a still longer 

 spinule, and on furrow margin, very near the lirst adambulacral, a very small spinelet sometimes 

 present, all bearing suhterminal groups of pedicellarise. 



Locality: Station 4398, off San Diego, Cal., 620 fins., green mud, rocks. 



Genus FREYELLA. Perrier. 



Freyella Perrier, Premiere note, prGliminaire sur lea Echinodermes recueillis par le Travailleur et le Talisman, Ann. uVs 

 Sciences Nat., Zoologie, XIX, 1885, - r '. 



Freyella fecunda, new species. 



Kays 13. R = .">.".o nun. (approximately); r = 13.5 mm. R = approximately 25r. Diameter of 

 disk over all, 27 nun.; of elevated portion, 24 nun.; thickness of disk. 5 mm. Diameter of ray at 

 base, o' mm.; at widest portion of genital inflation, 25 to 75 mm.; from base, 7.5 nun. 



Rays very long, narrow, tapering gradually; a trifle narrower at base than throughout the very 

 extensive genital region, which is not inflated; rays subcy lindrical at base, depressed on genital region; 

 latter extending nearly half length of ray; beyond genital region ahactinal memhrane collapsed upon 

 ambulacra! ridge, which can be seen through the translucent memhrane; disk fairly large, ahactinal 

 surface slightly raised above level of base of arms; lateral spines of arms long and slender. 



Edge of disk rounded and somewhat undulating in outline; ahactinal memhrane very tight and 

 beset with equally spaced, small, terete, blunt spinelets, those about anal opening a trifle longer than 

 the others; shape of spinelets due to a membraneous sheath, the calcareous portion acicular; interradial 

 plate rather high and narrow, confined to side wall of disk, inconspicuous; ahactinal membraneof rays 

 rather thin and papery, the plates being superficially invisible except in a thoroughly dried specimen; 

 plates rudimentary, very thin, imbricating at least in the median radial region, irregular in outline, and 

 consisting of a single layer of delicate calcareous network. In the extensive genital region the ahacti- 

 nal membrane is beset with minute, evenly spaced prickles, which are incased in memhrane, giving 

 them a superficially blunt appearance; these prickles much smaller than those of disk, and 1 or l' to 

 each plate, commonly 2: on outer part of genital region, where the plates are not so closely placed, the 

 prickles are more widely Bpaced, and many of the plates are without them. Indistinct hands of micro- 

 scopic pedicellarise, from each lateral and adambulacral plate proceeding toward median radial line, 

 where they break up; on the semi-transparent memhrane of outer half or two-thirds of ray (beyond 

 genital region), where there are no prickles, these hands of pedicellariae more conspicuous, and 

 extending entirely across ahactinal surface, hut frequently more or less irregular on median keel of 

 ray; extending upward from the rudimentary marginal or lateral plates are a few plates stouter than 

 the other ahactinal ones, forming thus the rudiments of costal ridges. 



Ambulacra! plates longer than high, and in basal portion of ray nearly as wide as long; armature 

 consisting of (1) 2 delicate spinelets situated at aboral end of the slightly excavated furrow margin, 

 these sheathed in memhrane and bearing numerous minute pedicellarise; spinelets fairly long and 

 reaching more than halfway across the wide furrow; throughout greater part of ray hut 1 spinelet on 

 the furrow; (2) on actinal surface near aboral end 2 spines forming an oblique transverse series with 

 the furrow spinelet, the inner the shorter, about twice as long as the furrow spinelet, the outer from 2 

 to 2i times longer than the inner; outer spine about 10-11 mm. long; all sheathed in delicate mem- 

 brane, forming a blunt saccular tip, all beset with microscopic pedicellarife, and all uniformly slender 

 and sharp; (3) partially fused to lateral face of alternate adamhulacrals a lateral plate, bearing a 

 long, slender spine (13 mm.) sheathed in memhrane hearing microscopic pedicellarise; on plates adja- 

 cent to lateral spine the actinal adambulacral spines much shorter than on the others; near base of ray 



