in d. Naturgesch. d. nied. Thiere währ. d. Jahre 1872 — 1875. 367 



phipolis, die durch A. aDomala in erstere übergeht) 

 dargestellt. Die neuen Arten sind folgende: Ophiomusium 

 acuferum, 0. testudo, Ophiozona nivea, Ophiacantha stellatttj 

 sämmtlich von Barbados, 0. Inrsiita Florida, 0. marsupialis 

 Juan Fernandez (gebiert lebendige Junge von ansehnlicher 

 Grösse), Ophiometra cervicornis Cuba, Ämphüira anomala 

 Juan Fernandez, Ä. JBarharae Californien, A. repens Flo- 

 rida, A. duplicata Barbados, Ophiocnida filogranea Florida, 

 Ophioplax (n. gen.) Ljungmani Barbad., Ophioscolex 

 Stimpsoni Florida, Astrotoma (n. gen.) Agasswii Magel- 

 lans-Str., Astroschema tenue Barbados, Astrophyton Pour- 

 talesii Patagonien, A. spinosum Panama. 



Ophiopläxn. gen. Teeth : no tooth-papillae; numerous mouth- 

 papillae. Scaling of disk beset with granulation. Arms long and 

 rather stiff. Arm-spines few and smooth, arranged on the ridges 

 of the side armplates. One very large tentacle-scale on the sider 

 arm-plate, and others minute, on the under arm-plate. Two long 

 genital openings in each interbrachial space. (The genus stands 

 near Ophiocnida, biit is distinguished by the numerous mouth-papillae 

 arranged as in Ophiura, and by the singular tentacle-scales.) 



Astrotoma n. gen. Disk and arms granulated. Radial ribs 

 low and narrow, running to centre of disk, Arms simple and tra- 

 versed by annular ridges bearing microscopic spines. Tentacle-spines 

 stout, erect, standing by all the pores except those close to the 

 mouth. No mouth-papillae. Teeth and tooth-papillae similar and 

 spiniform, arranged in an clump at the inner point of the mouth- 

 angle. Two genital openings lying at the outer corners of each 

 interbrachial space. (This simple-armed Astrophyton resembles 

 Astronyx in its dentition, while in the covering of the disk and 

 arms and in the tentacle-spines it is between Astroschema and 

 Astrogomphus.) 



In den Actes Soc. Linn. Bordeaux T. XXVIII p. 79 u. 

 80 giebt Lyman schliesslich noch eine Aufzählung der 

 sechs bei Neu-Caledonien vorkommenden Ophiuriden. 



Thomson erwähnt in seinem Werke über die Tiefsee 

 ausser einer mit Ophiothrix fragilis nahe verwandten Oph. 

 Lütheni (p. 174) und Ophiomusium Lymmii n. (p. 174, 

 Fig. 32 und 33) noch (p. 123) zweier anderer neuer Ophiu- 

 riden, einer Ophiomyxa und eines Ophiopus. Die Nature 

 1873. T. VIII p. 400 enthält ausserdem noch Holzschnitt 

 von Ophioglypha hullata n. sp. 



