BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Ophioplinthaca globata, new species. 

 Ophioplinthaca hastata, new species. 

 Ophioplinthaca pulehra Koehler. 

 Ophioplinthaca rudis Koehler. 

 Ophiocamax rugosa Koehler. 



Order III. GNATHOPHIUKIDA. 



Family AMPHIURIDAE Ljungman, 1867 (emended Matsumoto, 1915). 



Amphiura agitata Koehler. 

 Amphiura ambigua Koehler. 

 Amphiura commutata, new species. 

 Amphiura dejecta, new species. 

 Amphiura dimessa, new species. 

 Amphiura diomedeae Liitken and Mortensen. 

 Amphiura grandisquama Lyman. 

 Amphiura uncinata Koehler. 

 Amphiura vadicola Matsumoto. 

 Amphipholis kochii Liitken. 

 Amphipholis lobipes, new species. 

 Amphipholis misera (Koehler). 

 Amphiodia crassa (Koehler). 

 Amphiodia debita, new species. 

 Amphioplus legatus, new species. 

 Amphioplus conductus, new species. 

 AmpMoplus impressus (Ljungman). 

 Amphioplus lucidus, new species. 

 Amphioplus luctatob, new species. 

 AmpMoplus relictus (Kcehler). 

 Amphioplus rhadinobrachius H. L. Clark. 

 Amphilimna multispina, new species. 

 Ophiactis afflnis Duncan. 

 Ophiactis definita, new species. 

 Ophiactis maculosa Martens. 

 Ophiactis profundi Liitken and Mortensen. 

 Ophiactis savignyi (Miiller and Troschel). 

 Ophiopholis mirabilis (Duncan). 

 Ophiocentrus aculeatus Ljungman. 

 Ophiocentrus asper (Koehler). 

 Ophiocentrus vexator, new species. 



Family AMPHILEPIDAB Matsumoto, 1915. 



Amphilepis protecta Kcehler. 

 Amphilepis bemittens, new species. 

 Amphiactis duplicata (Lyman). 



Family OPHIOTRICHIDAE Ljungman, 1867. 



Ophiothrix aristulata Lyman. 

 Ophiothrix armata Kcehler. 

 Ophiothrix aspidota Miiller and Troschel. 

 Ophiothrix bellax, new species. 

 Ophiothrix capillaris Lyman. 



