390 Mr. W. K. Fisher on 
b', Superomarginal spines very slender, ap- 
pressed; no adradial spines; ten carinal 
plates correspond to fourteen adradial e 
and fourteen superomarginal plates; 
fourth or lowest actinolateral series 
extending far along ray; plates of first 
two actinolateral series as broad as 
inferomarginals ; adradial plates broadly 
overlapped by adjacent series ........ ophiurus, Fisher. 
b?, Superomarginal spines more robust, often 
bristling ; an incomplete series of ad- 
radial spines ; ten carinal plates corre- 
spond to nineteen adradial and nineteen 
superomarginal plates; fourth or lowest 
actinolateral series short (one-sixth 
length of ray); plates of first actino- 
lateral series, only, as broad as the 
inferomarginals ; adradial plates exposed 
(about 50 per cent. broader than in 
OPNAUTUS). ac. pos ie pit ea ie eel: Raaeais actinoeles, sp. n. 
a®?, With three series of actinolateral plates; the 
two dorso-lateral and the intermarginal 
series of papular areas with two to four 
papule, the areas rather large; all spines 
rather long and bristling. 
b'. No large pedicellaria regularly on the 
second spine of the prominent or carinate 
adambulacral plates jx. sire a pishe sala me evermanni, Fisher, 
b*, A large pedicellaria regularly present on : 
the second spine (from furrow) of the 
prominent or carinate adambulacral 
EA EES isc deste his at ade he asns Sena eieels mordax, subsp. 0. 
Zoroaster actinocles, sp. n. 
Rays 5. R=161 mm., r=11 mm., R=14°67; breadth 
of ray at base, 13 mm. Rays slender, evenly tapered to the 
extremity, which is capped by a relatively large terminal 
plate; disk elevated at centre ; carinal ridge rather prominent. 
Resembling a slender-rayed Z. fulgens, but differing in having 
the plates of the second, third, and fourth actinolateral series 
smaller, the fourth series being rudimentary; in having 
slenderer superomarginal spines (which are decidedly slen- 
derer than the carinal spines), fleshier spinelets, relatively 
larger carinal plates, never but one actinolateral spine to 
a plate ; in having a decidedly larger terminal plate, and a 
large pedicellaria on the second (from furrow) adambulacral 
spine. ‘The papular pores are small ; there are five regular 
longitudinal series, with the beginning of a sixth at base of 
ray, on either side of the carinal plates—namely, two dorso- 
lateral, one intermarginal, 2+1 incomplete actinolateral 
series. Papulz solitary and small. Carinate or prominent 
