42 



IOWA STUDIES IN NATURAL HISTORY 



*Amphiura palmeri 

 Amphiura semiermis 



*Aniphiura stimpsonii 

 Amphiura hihamula 

 Amphiura complanata 

 Amphiura crassipes 

 Amphiura diducta 

 Amphiura fihidata 

 Amphiura flexuosa 

 Amphiura kiikenihali 

 Amphiura rathhuni 

 Amphiura vivipara 

 Hemipholis elongata 

 Ophiophragmus hrachyactis 

 Ophiophragmus pulcher 

 Oph iophragmus I iltkeni 

 Oph ioph ragmu s ivilrdemanni 

 Ophioph ragmus filogranea 

 Ophiophragmus septa 

 Ophionephthys limicola 

 Ophionema intricata 

 Amphipholis ahnormis 

 Amphipholis gracillima 

 Amphipholis pachyhactra 

 Amphipholis pentacantha 

 Amphipolis squamata 

 Amphipolis suhtiUs 

 Ophiostigma isacanthum 



Ophiactis 



Amphiodia pidchella 

 Amphiodia repens 

 Amphiodia rhabdota 

 Amphiodia riisei 

 Amphiodia trychna 

 Amphiodia liitkeni 

 Amphiodia tymhara 

 Ophiocnida loveni 

 Ophiocnida scdhriuscula 

 Ophiocnida cuhan<i 

 Ophiocnida scahra 

 Amphioplus ahditus 

 Amphioplus agassizii 

 Amphioplus coniortodes 

 Amphioplus cuneata 

 Amphioplus incisa 

 Amphioplus nereis 

 Amphioplus thrombodes 

 Amphioplus tumida 

 Amphioplus vertnlli 

 Amphilimna olivacea 

 Amphilimna carihea 

 Ophiactis cyanosticta 



*Ophiactis duplicata 



*Ophiactis miilleri 

 Ophiactis plana 

 Ophiactis savignyi 

 Ophiactis lymani 

 loricata 



Family Ophiotrichidae 



*Ophiothrix angulata Ophiothrix lineata 



Ophiothrix angulata megal- *Ophiothrix oerstedii 



aspis Ophiothrix pallida 



Ophiothrix hrachyactis ^Ophiothrix suensonii 



Ophiothrix rathhuni 



Family Ophiochitonidae 



Ophiochiton grandis *Ophionereis reticulata 



