42 U.S. NATIONAL MUSEUM BULLETIN 264 



Hypselaster affinis Mortensen 



U.S. National Museum Bulletin 100, vol. 14, pt. 3, p. 121, 1948. 



Holotype: 



USNM E7152 (dry), Albatross Sta. 5582, Darvel Bay, Borneo, 

 4019' 54"N., 118058'38"E., 1,629 meters, Sept. 26, 1909. 



Paratypes: 



USNM E9334 (1 dry). Albatross Sta. 5469, Atulayan Island, Philippines, 

 13036'48"N., 123038'24"E., 915 meters, June 18, 1909. 



USNM E9425 (1 dry), Albatross Sta. 5637, Bouro Island, Celebes, 

 3O53'20"S., 126048'E., 1,281 meters, Dec. 10, 1909. 



Hypselaster brachypetalus H. L. Clark 



Memoirs of the Museum of Comparative Zoology at Harvard, vol. 46, 

 no. 2, p. 191, pL 148, figs. 3-4; pi. 154, figs. 1-3, 1917. 



Holotype: 



MCZ 2869 (dry), Blake Sta. 268, off Grenada, 955 fms. 



Hypselaster dolosus H. L. Clark 



Echinoderms from Australia, p. 430, pi. 28, figs. 4-7, 1938. 



Holotype: 



MCZ 7255 (dry), jetty flat, Broome, Western Australia, 1929. 



Paratypes: 



MCZ 7245 (7 dry), see above. 



Hypsiechinus coronatus Mortensen 



The Danish /ng^oZ/- Expedition, vol. 4, no. 1, p. 86, pi. 5, fig. 1; pi. 7, 

 figs. 1-20; pi. 8, figs. 5, 9, 15, 17, 18, 24, 25, 38; pi. 11, figs. 6, 1903. 



Syntype: 



MCZ 1400 (2 dry), Ingolf Sta. 81-84, southwest of Iceland, 61°44'N., 

 27°11'W., 485-633 fms. 



Idiobryssus coelus H. L. Clark 



Allan Hancock Pacific Expeditions, voL 2, p. 173, pi. 17, figs. 1-2, 

 1939. 



Paratype: 



MCZ 7495 (1 dry), Velero Sta. 783, Tower Island, Darwin Bay, 

 Galapagos Islands, 40-79 fms., 1938. 



Isopatagus obovatus Mortensen 



U.S. National Museum BuUetin 100, vol. 14, pt. 3, p. 113, 1948. 



Holotype: 



USNM E7149 (dry), Albatross Sta. 5425, Cagayan Island, Jolo Sea, 

 8037'45"N., 12lOll'E., 907 meters. Mar. 31, 1909. 



Paratypes: 



USNM E9515 (1 alcohol), Albatross Sta. 5425, see above. 



USNM E9347 (1 dry), Albatross Sta. 5425, see above. 



