CLARK: AUSTRALIAN AND INDO-PACIFIC ECHINODERMS. 125 



Ophiarachnella elegans- 

 Pectinura elegans Bell, 1894. Proc. Zool. Soc. London, p. 406. 

 Macclesfield Bank, East Indies, 13-35 fms. 



Ophiarachnella megaloplax. 



Pectinura megaloplax Bell, 1884. "Alert " Rept, p. 134. 

 Port Molle, Queensland, 14 fms. 



Ophiarachnella nitens. 

 Pectinura nitens Koehler, 1905. Oph. " Siboga " Litt., p. 10, pi. 1, figs. 10-12. 

 Off Sumbawa, D. E. I., 38 fms. 



Ophiarachnella stabilis. 

 Pectinura stabilis Koehler, 1905. Oph. " Siboga " Litt., p. 5, pi. 1, figs. 7-9. 

 Paternoster Islands, 7 fms. ; off Waigiou, 45 fms. 



Ophiarachnella petersi. 

 Ophiopeza petersi Lyman, 1878. Bull. M. C. Z., 5, p. 217, pi. 2, figs. 22-24. 



Off Cuba, 177 fms.; off Port Jefferson, Tortugas, Pla., l|-8 fms. 



Aside from the absence of the supplementary oral plate, this species shows well 

 the characters of the genus. So far as the few known specimens show, the supple- 

 mentary plates are never clearly marked, but in both of the specimens in the 

 M. C. Z. collection the oral shields bulge out on their distal margin into the inter- 

 brachial areas, and in one area of the larger specimen (Lyman's type) there is a 

 small supplementary plate. 



Ophiarachnella capensis. 

 Pectinura capensis Bell, 1888. Proc. Zool. Soc. London, p. 282, pi. 16, figs. 3, 4. 

 Cape of Good Hope. 



Ophiarachnella semicincta. 



Pectinura semicincta Studer, 1882. Abh. Konigl. Ak. Wiss. Berlin, p. 4, pi. 18, figs. 

 1-1 d. 



Vicinity of Cape Verde Islands, 38-58 fms. 



Ophiarachnella honorata. 

 Pectinura honorata Koehler, 1904. Oph. " Siboga," Mer Prof., p. 8, pi. 2, figs. 1-3. 

 Vicinity of Kei Islands, 170 fms. 



