264 
i V, 3), complanatæ; orales series duplices formani ^ internas /-2, 
externas 5 numerantes. Hab. ad oras insulæ indicæ Billi ton. 
(Specimen junior ?) 
Oreaster Weslermanni Llk. Dorsum deplanatum fere.^ 
brachia longissima^ radio stellæ major e minor em triplum quinta 
parte superante^ tessellæ marginales admodum convexæ^ alternantes^ 
c. 30: dorsuales., tuberculis / — 4 minutis obsitæ^ solæ (apice bra- 
chiorum excepta) ipsum marginem stellæ formant; areæ poriferæ 
triangulares ^ sæpe confluentes, poris numer o sissimis; tubercula 
numerosissima mediocria obtusa in nodis irabecularum , in parte 
centrali stellæ et basali brachiorum conica vel cylindrica fere, in 
par te terminali brachiorum crassiora. convexuj approximata, les- 
sellasque marginales fere æquantia, series quinas in brachiis formant, 
media c. 30 numerante; tubercula 6 duplicia paullo modo majora 
et parum inter cetera conspicua partern centralem stellæ circum- 
dant; tessellæ ventrales propriæ tuberculiformes, minutæ, numerosæ, 
propter granula obtegentia haud conspicuæ, præter granula singu- 
lam (prope ambulacra duplicem vel triplicem) spinam crassam ob- 
tusam gerunt; papillæ ambulacrales triseriatæ, internæ nonæ gra- 
dies, ceteræ crassæ, obtusæ, ternæ {rarius binæ vel quaternæ); 
pedicellariæ valvulatæ minutæ raræ prope ambulacra. Hab. ad 
oras Bengaliæ. 
Oreaster gracilis Ltk. Corpus pentagonum, lateribus 
rectis, angulis in brachia gracilia^ angusta, acuminala, haud 
carinata productis; dorsum minus allum; radius stellæ major 
minorem duplum et dimidium circiter æqvat; tessellæ marginales 
fere 30, haud alternantes, æquales et in peripheria stellæ for¬ 
manda æqualiter participes, omnes tuberculiferæ, tuberculis singulis, 
minutis, pedicellariis nullis; dorsum disci regulariter reliculatum, 
areis poriferis trigonis, trabeculis hexagonaliter disposilis, nodis 
trabecularum tuberculiferis, tuberculis minutis; in regionibus inter- 
brachialibus et lateribus brachiorum tubercula desunt, serie singula 
luberculorum c. 20 dorsum brachiorum percurrente ab apice usque 
ad tubercula quinque parum majora centrum circumdantia; areæ 
