EASTERN TROPICAL PACIFIC ASTEROIDEA. 101 
E. Armature of actinolateral plates with a central, slender spine longer than its fellows. 
F. Fourth actinolateral series of plates present; superomarginal spines not much more 
slender than carinal spines; spinelets scarcely fleshy...........-..---.-- fulgens+ 
FF. Fourth actinolateral series rudimentary; superomarginal spines decidedly more slender 
than those on carinals; spinelets fleshier..............------.-++.--- actinocles 
EE.! Armature of actinolateral plates with a trio of subequal spines longer than the others. 
trispinosus. 
DD. Carinal plates as long as wide or longer; superomarginal spines usually well-developed and 
often forming, conspicuous SereS....-- 02-22-2225. - eee eee e een e ene diomedeae. 
BB. Superomarginal plates unarmed. 
C.1 Carinal plates unarmed. 
D2 Covering of skeletal plates a close capillary spinulation. 
E2 Intraambulacral ridge (of alternate adambulacrals) with two spines, the outer with a 
huge pedicel arteyyat ilps easiest a ae dadote rere te teteae eal barathri. 
EE2 Intraambulacral ridge with three or four spines and no huge pedicellaria... .ackleyi Juv. 
DD Covering of skeletal plates made up of fine granules, little elongated; intraambulacral 
ridge with one spine and no huge pedicellaria..........--..--.++-eeee eee eeee adami. 
CC. Carinal plates armed with a more or less conspicuous central spine. 
D.* Actinolateral plates with a conspicuous central spine-bearing tubercle. 
E.2 Each adambulacral plate with two bunches of pedicellariae high up in furrow. . . .alfredi. 
EE.* No such bunches of pedicellariae. 
F. Rays strongly carinate; innermost adambulacral spine with a terminal tuft of about . 
Pen pedicel arise steerer eset rie caterer aiseke eters oe ake! el sirieis in) neo eresefo rots ophiactis. 
FF. Rays not strongly carinate; innermost adambulacral spine with four to eight pedicel- 
lariae near tip. 
G. Disk-plates unarmed; rays very long, slightly swollen at base and then tapering 
steadily to a slender tip RA = 18-20 Tae ee es cae eee magnificus. 
GG. Primary plates of disk armed with a central spine. 
H. Disk and arm-bases more or less depressed; non-projecting adambulacral plates 
VAAN TIN, (nee) steno a RGoonopanSrqselous+ dee odbocEaberocdoe planus. 
HH. Disk and arm-bases not depressed; non-projecting adambulacral plates with 
least Spite isn Sooroeboopesegdcoe sade oe oma Soneoebaneree hirsutus. 
DD.* No conspicuous tubercle near center of actinolateral plates though one tubercle may be 
somewhat larger than others. g 
E4 R =16-18r; arms slender and tapering; no huge pedicellariae on adambulacral plates. 
longicaudus. 
EE! R = 10-15r; arms stouter and less tapering; huge pedicellariae present on adambulacral 
iUM Mae Samm como aod ocde cod ocdac soos ets aecoescopMe oe onuosonass spinulosus. 
AA. Adradial series of plates more or less reduced or wanting, their place often occupied by a con- 
spicuous groove (sulcus) on each side of carinal series of plates. 
B. Disk large, low, very distinctly delimited from rays by a ring of massive, semiglobular plates; 
primary plates all massive and semiglobular; all plates covered with capillary spinelets with a 
ity Gina Gomes mnienyieses| 45 codeneoons een ocoongoeges Sooner coooneesscae gilesit. 
BB.! Disk not as above. 
C2 Superomarginal plates conspicuously armed with a central spine............ macracanthus. 
CC2 Superomarginal plates practically unarmed. 
D.A Adambulacral plates with two transverse series of actinal spinelets. 
E.5 Carinal plates armed, deeply notched on both sides...............-....-- angulatus. 
BE >) Carmal plates unarmed. Sqm anish rect esate eleseietain clits) ie he stale microporus. 
1 The figures given by Sladen (Challenger Ast., pl. 66) purporting to be fulgens are almost certainly 
diomedeae, for Sladen called all the western Atlantic specimens fulgens; his description too seems to have 
been made from the American form. This unfortunate state of affairs is misleading and may be why 
Koehler considered his Bay of Biscay specimen a new species (trispinosus) instead of referring them to 
fulgens. The differences between trispinosus and Sladen’s fulgens are evident, but comparison of Koeh- 
ler’s descriptions and figures with a true fulgens leads one to suspect they are identical. 
2 As Fisher’s description is brief and comparative, I am not sure that my summary of the distin- 
guishing features will prove reliable. 
