Boone, Echinodermata, Cruises of "Ara" and "Alva" ill 



extensive Indo-Pacific distribution for this species. Ophiarthrum 

 pictum (Muller and Troschel) , which apparently has its center of 

 distribution in the Philippines-New Guinea area, is now recorded 

 from southeastern Queensland coast. 



Four species represent the Society Islands fauna, namely, the 

 above-mentioned rare Ophiactis hrocki de Loriol ; the exquisite cir- 

 cumtropic 0. savignyi (Muller and Troschel) ; Ophiocoma scolo- 

 pendnna (Lamarck), represented by a series of brittle-stars 

 ranging from 3 to 20 millimeters disk diameter, and Ophiolepis 

 cincta Muller and Troschel. 



The Samoan Island fauna is represented by a single species, 

 the above-mentioned Ophiocoma scolopendrina (Lamarck) with 

 a series of very large adults. 



Two magnificent specimens of the conspicuously lovely Ophio- 

 mastix lutkeni Pfeffer, so rare in museum collections, were col- 

 lected in the coral reefs of Bali and establish the best series of 

 this species within Occidental museums. 



Two species of Ophiothrix, longipeda (Lamarck) and striolata 

 Grube were brought up clinging to the "Alva's" anchor chain, 

 from a depth of 14 fathoms in Seba-Seba Bay, as was also a 

 specimen of Ophiocnemis niarmorata (Lamarck), while a fourth 

 species, Ophiothela danae Verrill, came up a commensal, riding 

 the primary spines of the sea-urchin, Prionocidaris baculosa 

 variety annulifera (Lamarck) , which was also brought up on 

 the anchor chain, as was a specimen of Ophionereis dubia Aud- 

 ouin and Savigny. 



That portion of the Ophiuran collection obtained by the "Ara" 

 World Cruise of 1928-29 herein reported is represented by nearly 

 a hundred specimens, of four species from two archipelagoes, 

 the Anambas Islands, South China Sea, and the Hawaiian Islands. 



The four specimens of Ophiothrix expedita Koehler, from the 

 Anambas Islands, are of especial interest, being representatives 

 of a new species discovered by the "Siboga" in the Dutch East 

 Indies and hitherto known only from the "Siboga" specimens, 

 which are deposited in the Leyden Museum. 



The Hawaiian fauna is represented by two species of Ophio- 

 coma, lineolata Muller and Troschel, which has a far-flung distri- 

 bution in the Indo-Pacific and has been previously reported from 

 the Hawaiian Islands, and the rare 0. wendti Muller and Troschel 

 here recorded for the first time from Hawaii. The *'Ara" catch 



