PLATE XIX. 
Figs. 1, 2. PSEUDARCHASTER DISCUS, nD. sp. 
. Abactinal aspect ; magnified 2 diameters. 
. Actinal aspect ; magnified 2 diameters. 
[For magnified details of this species see Pl. XLII. figs. 3, 4.] 
Figs. 3, 4. PSEUDARCHASTER INTERMEDIUS, 0. sp. . 
. Abactinal aspect ; magnified 2 diameters. 
. Actinal aspect; magnified 2 diameters. 
_ [For magnified details of this species see Pl. XLII. figs. 5, 6. | 
Figs. 5, 6. GNATHASTER ELONGATUS, 0. Sp. 
. Abactinal aspect of a young example; magnified 3 diameters. 
. Actinal aspect of a young example ; magnified 3 diameters. 
[For figures of adult examples of this species see P]. XLVIII. figs. 
1-4; for magnified details see Pl. XLIX. figs. 5-10. ] 
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