EGHINONEUS PLATE 19 bop 3 S15). ae See SS AM Westereren del.
PLATE20. 1-13.EchinonéuscyclostomusLrEske. Valves of tridentate pedicellariae. 1.—Stalkandhead,0.65mm.fromaboralendofanalsystem.Specimenmeasuring12mm.long. 2.—ValveA,0.30mm.interiorview. 3.—ValveB,0.29mm.exteriorview. 4.—ValveC,0.26mm.interiorviewprofile,fromaboralendofanalsystem. Test measuring 11 mm.
long.
5.—ValveB,0.32mm.exteriorview,midwaybetweenactinostomeandambitus,inrightanterior interambulacrum. Test measuring 13 mm.
long.
6.—ValveB,0.44mm.exteriorview,nearactinostome,inrightanteriorinterambulacrum.Test measuring 13 mm.
long.
7.—ValveB,0.40mm.exteriorview,adoralendofanalsystem.Testmeasuring13mm.long. 8.—ValveB,0.33mm.exteriorview,aboralendofanalsystem.Testmeasuring10mm.long. 9.—ValveB,0.38mm.exteriorview,midwaybetweenactinostomeandambitus,inoddanterior ambulacrum. Test measuring 12 mm.
long.
10.—ValveB,0.35mm.exteriorview,midwaybetweenactinostomeandambitus,inrightposterior interambulacrum. Test measuring 10 mm.
long.
11.—ValveC,0.34mm.exteriorview,nearactinostome,inleftanteriorinterambulacrum.Test measuring 11 mm. long. > 12.—ValveB,0.39mm.exteriorview,aboralendofanalsystem.Testmeasuring18mm.long. 13.—ValveC,0.32mm.exteriorview,adoralendofanalsystem.Testmeasuring18mm.long. Figures1-7,and9arefromspecimensfromFakaravaIsland,PaumotuIslands,Figures8,10-13 are from specimens from Makemo Island, Paumotu Islands. All the specimens were alcoholic. Magnification as on Plate 19, Of asingle pedicellaria.
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1899 -1900. B.Meisel lith AM Westeréren del
PLATE21. 1-20.EchinonéuscyclostomusLEskKE. Valves of ophicephalous pedicellariae. 1.—Stalkandhead,0.63mm.long,fromleftposteriorinterambulacrum,actinalsideofambitus. 2.—Pedicellaria,0.26mm.valveCincentre,fromrightposteriorinterambulacrum. 3.—ValveA,0.25mm.exteriorview. 4,—ValveB,0.23mm.interiorview. 5.— Valve B, 0.23 mm. interior view profile. Of a single pedicellaria. 6.—ValveC,0.22mm.exteriorview,fromleftposteriorinterambulacrum, actinal side of ambitus. 7.—ValveC,0.25mm.exteriorview. 8.—ValveA,0.28mm.exteriorview,fromrightposteriorinterambulacrum,|samepedicellaria. actinal side of ambitus. Figures1-8.Dryspecimenwithspinesmeasuring34mm.long.LordHoweIsland. 9.—ValveB,0.21mm.interiorview. 10.—ValveC,0.20mm.exteriorview,fromleftposteriorinterambulacrum towardsapicalsystem.Testwithspinesmeasuring30mm.long. Lord Howe Island. 11.—ValveB,0.16mm.interiorview. 12.—ValveC,0.15mm.interiorview,fromleftanteriorinterambulacrum, apicalsystem. Alcoholic specimen measuring 11mm.long. Fakarava Island, Paumotu Islands. 13.—ValveB,0.21mm.interiorview,fromleftanteriorinterambulacrum,midwaybetweenactinostome and ambitus. Alcoholic specimen, with spines measuring 15 mm.long. Makemo Island, Paumotu Islands. 14.—ValveC,0.19mm.exteriorview,fromrightanteriorinterambulacrum,actinalsideofambitus. Testmeasuring15mm.long.MakemoIsland. 15.— Valve A, 0.32 mm. interior view. } 16.—ValveB,0.31mm.interiorview. 17.—ValveC,0.28mm.exteriorview,fromrightposteriorambulacrum,to-}Ofasinglepedicellaria. wardsmarginofanalplastron.Alcoholicspecimen,withspines measuring30mm.long.Barbados(?) 18.—ValveB,0.24mm.interiorviewfromrightposteriorinterambulacrumnearapicalsystem.Test measuring30mm.long.Barbados(?) 19.—ValveC,0.22mm.exteriorview,fromleftposteriorinterambulacrum.Alcoholicspecimen measuring26mm.long.Barbados(?) 20.—ValveC,0.19mm.exteriorview,fromleftposteriorinterambulacrum,nearapicalsystem.Test measuring26mm.long.Barbados(?) Same pedicellaria. | Same pedicellaria. TheenlargementofFigures2to20isthesame,butisonaslightlylargerscalethanthoseofPlates 18-20.