148 
stand out at a right angle to the arm, as is the case in the pre- 
ceding species. The two ventral spines are slightly longer than the 
others. 
The colour is white, somewhat shining, especially in the oral 
region. The eggs are very small and numerous; it may thus be 
inferred that it has typical pelagic larvæ. 
This species appears to be nearly related to Åmph. angularis 
Lym. occurring at Kerguelen (cf. Koehler. Échinodernies, recueillis 
par M. R. du Baty, aux iles de Kerguelen, en 1913—14. Ann. Inst. 
Océanogr. VII. 1917. p. 67. PI. VIII^ figs. 13—15). In faet, it is 
only the different number of armspines (4—3 in angularis, 6 — 5 
in alba) and the different character of the dorsal plates (broadly 
in contact in alba, scarcely so in angularis) which appear to form 
distinguishing characters. This is, however, sufficient for showing 
that they cannot simply be regarded as identical. Also to Åmph. 
constricta it bears a considerable resemblance; but the faet that 
this latter species is viviparous at once proves that these two forms 
are not identical. 
28. Amphiura hinemoæ n. sp. 
Figs. 24. a—d. 
Off White Island (370 40’ S. 177« 1’ E.), 55 fms; sandy mud. 19/XII.14. 
2 specimens. 
Disk covered by numerous rather fine scales, among which 
the six primary plates are distinet, through their somewhat larger 
size and through having a whitish spot in the middle, surrounded 
by a darker ring, due to a special structure of this part of the 
plate. The radial shields are narrow and elongate, equalling half 
the radius of the disk in length; they are separated throughout 
their length. The underside of the disk is naked, the limit between 
the naked part and the scales along the border being quite sharp; 
a few larger scales are found along the genital slits. The outer 
mouth papilla is somewhat leafshaped, not simply spiniform. The 
oral shields are, in the larger specimen, rhomboidal, in the smaller 
specimen almost triangular, with outer edge rounded. Adoral plates 
rather narrow, meeting within. The ventral plates are somewhat 
elongate, with outer edge slightly coneave and the outer corners 
rounded. The first fully formed ventral plate is distinetly broader 
