263 
Oreaster australis Llk. Dorsum altum; brachia angusta^ 
acuta^ elongata; radius stellæ major minorem triplum fere æquat; 
tessellæ marginales c. 21; dorsales angulorum a margine paulum 
remotæ; iubercula minuta singula in tessellis marginis ventralibus 
plerumque adsunt^ in marginalibus dorsi angulorum vero perpauca, 
bractiiorum crebriora; in tessellis dorsalibus propriis plerumque ad- 
sunl, regulariter disposita^ series quinas in brachiis formantia, media 
tuberculis c. 13—14 majoribus gaudente; intimum seriei cujus- 
cunque omnium maximum; areæ poriferæ confluentes^ poris nu- 
merosissimis; tessellæ ventrales propriæ granulatione obtectæ, haud 
conspicuæ^ yranula minuta pedicellariasque numer o sissimas lineares 
elongatas gerunt; papillæ ambulacrales internæ nonæ, externæ 
ternæ {rarius quaternæ); papillæ orales ori proximæ series singulas 
{non^ut peri solet duplices) formani. Hab. ad oras Australiæ 
{Novæ Hollandiæ). 
Oreaster H edemanni Ltk. Dorsum sat altum brachia 
triangularia^ mediocria, acuta; radius stellæ major minorem duplum 
et dimidium æquat; tessellæ marginales utrinque c. 15, dorsales 
ventralibus magnitudine æquales, parte externa brachiorum forsan 
excepta haud alternantes et in peripheria stellæ formanda æqua- 
liter participes; nonnullæ {dorsales sc. 5, ventrales 5 —6.^ ad 
angulos stellæ sitæ, nec non 1 vel 2 versus apices brachiorum lo- 
cum tenentes) tubercula minuta gerunt; areæ poriferæ regulæres, 
sejunctæ, poris numero mediocri, juxta tessellas marginales 
maximæ; tubercula dorsualia quinque sat magna apice nuda, 
spatiis diametros basales æquantibus inter se separåta, tuberculum 
centrale mediocre circumdant; series fere continua tuberculorum 
similium 7 — 9, versus apices brachiorum decrescentium carinas 
brachiorum coronat; minora 1-3 in lateribus brachiorum series 
duplices utrinque formant; ad angulos stellæ vulgo nulla; tessellæ 
ventrales propriæ sat magnæ, sejunctæ, granula majuscula, 
tuberculis haud intermixla, gerunt; pedicellariæ lineåres elongatæ in 
vicinis ambulacrorum, rariores in dorsualibus tuberculis destitutis, 
conspiciuntur; papillæ ambulacrales internæ 7, externæ 2 {rarius 
