276 RECENT OPHIURANS. 



840. O. OBTUSA Koehler, 1905. Siboga-exp. Oph. litt., p. 98, pi. 11, f. 6-10, pi. 16, f. 5. 



1 coTYPE. Dutch East Indies: Flores, Bay op Madura, 38-50 fms. 



841. O. OLIVERI Benham, 1911. Trans. N. Z., inst., 43, p. 154, f. 14-17. 



1 COTYPE. Kermadec Islands: Sunday Island, Coral Bay. 



842. O. ORSTEDII Lutken, 1856. Vid. med., p. 15. 1859. Add. ad hist. Oph., pt. 2, p. 149, pi. 4, f. 



3a-e. 



322 specimens. Florida: Miami; KeyBiscayne; Cape Florida; off Carys- 

 fort Reef, 206 fms.; Key West; Tortugas. Panama: Veragua. Venezuela: 

 Bay of Cumana. Jamaica: Montego Bay. St. Thomas. 



843. O. pallida Ljungman, 1871. Otv. Kongl. Vet.-akad. Forh., 28, p. 626. Koehleb, 1913. Zool. 



iahrb. Suppl., 11, pi. 20, f. 5; pi. 21, f. 10, 11. 



1 COTYPE. Anguilla, 180 fms. 



844. O. PANCHYENDYTA H. L. Clark, 1911. Bull. 75 U. S. N. M., p. 264, f. 131. 



1 paratype. Korea Strait, 59 fms. 



845. 0. PENTAPHYLLUM (Pennant). 



Asterias pentaphyllum Pennant, 1777. Brit, zool, 4, p. 64. 



Ophiothrix pentaphyllum Ljungman, 1871. Ofv. Kongl. Vet.-akad. Forh., 28, p. 622. 



20 specimens. British Seas. Scotland: Oban. England: Liverpool; 



Isle of Wight, 35 fms. Wales: Milford? Madeira Islands?. 



846. O. PETERSI Studee, 1882. Abh. K.-Preus. akad. wiss. Berlin, p. 25, pi. 3, f. 12-12e. 



3 cotypes. West of the Bissagos Islands, 150 fms. 



847. O. PLANA Lyman, 1874. Bull. M. C. Z., 3, p. 238, pi. 4, f. 1-8. 



7 specimens, including holotype and 2 paratypes. Philippine Islands, 

 25-30 fms. Sulu Archipelago : Sulu Island, Sulu Harbor, 8 fms. Dutch East 

 Indies: Celebes, Macassar. 



848. O. POECILODISCA, sp. nov. {ttoikLXo^, ornamented + SI^kos, disk). Plate 13, f. 5. 



Disk 10 mm. in diameter; arms 40-45 mm. long. Disk covered with large 

 scales, scarcely 100 all told, about half of which carry slender, terete spinelets, 

 1 mm. long. Radial shields large, perfectly smooth, separated from each other 

 by a longitudinal series of 3 or 4 long scales. Upper arm-plates hexagonal 

 or pentagonal with somewhat rounded angles, or quadrilateral with distal 

 margin widely curved, in contact for the width of the proximal margin, wider 

 than long basally but becoming longer than wide distaUy. Interbrachial spaces 

 below covered by bare skin except centrally at and near margin where there is a 



