= 
gq 08 0a’ de 
=r 
EoMcoico ice 
gg dq 08 09 
m OO 
COND & 
Robt 
Sh 
ig. 10. 
g. 11. 
ig. 12. 
PLATE XXVIII. 
Figs. 1-4. SryRACASTER ARMATUS, 0. sp. 
. A portion of the abactinal surface; magnified 18 diameters. 
. Mouth-plates; magnified 5 diameters. 
. Adambulacral plates ; magnified 9 diameters. 
. A cribriform organ ; magnified 6 diameters. 
[For macroscopic figures of this species see Pl. XXIV. figs. 1-4. ] 
Figs. 5-8. HypHALASTER INERMIS, 0. sp. 
. A portion of the abactinal surface ; magnified 20 diameters. 
. Mouth-plates ; magnified 9 diameters. 
Adambulacral plates ; magnified 12 diameters. 
. A cribriform organ ; magnified 9 diameters. 
[For macroscopic figures of this species see Pl. XXV. figs. 4-6.] 
Figs. 9-12. HypHALASTER PLANUS, 0. sp. . 
A portion of the abactinal surface ; magnified 18 diameters. 
Mouth-plates; magnified 5 diameters. 
Adambulacral plates; magnified 8 diameters. 
A cribriform organ ; magnified 6 diameters. 
[For macroscopic figures of this species see Pl. XXV. figs. 1-3. ] 
Figs. 13-16. HyPHALASTER HYALINUS, h. sp. 
. A portion of the abactinal surface ; magnified 15 diameters. 
. Mouth-plates; magnified 9 diameters. 
Adambulacral plates; magnified 12 diameters. 
. A cribriform organ; magnified 15 diameters. 
[For macroscopic figures of this species see Pl. XXVI. figs. 1-5.] 
Figs. 17-20. HypHALASTER DIADEMATUS, 0. sp. 
. A portion of the abactinal surface ; maguified 20 diameters. 
Bellis 
5 AG 
. A cribriform organ ; macnified 12 diameters. 
Mouth-plates ; magnified 10 diameters. 
Adambulacral plates ; magnified 15 diameters. 
[For macroscopic figures of this species see Pl. XXI. figs. 1-4.] 
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