68 U.S. NATIONAL MUSEUM BULLETIN 264 



Syntypes: 



USNM E925 (1 dry), Albatross Sta. 4160, vicinity of Modu Manu, 

 31-39 fms., Aug. 7, 1902. 



USNM E924 il dry). Albatross Sta. 4146, vicinity of Modu Manu, 

 23-26 fms., Aug. 5, 1902. 



Mortensen (Monograph, vol. 5, no. 2, p. 489) considers this merely a 

 young Rhynobrissus pyramidalis . 



Rhopalocidaris hirsutispina var. viridis Mortensen 



U.S. National Museum Bulletin 100, vol. 6, no. 4, p. 273, pi. 61, fig. 

 2; pi. 73, figs. 1-2; pL 78, figs. 6-8, 1927. 



Holotype: 



USNM E1382 (alcohol). Albatross Sta. 5543, Tagolo Light, north 

 Mindanao, 8047'15"N., 123035'E., 296 meters, Aug. 20, 1909. 



Rhopalocidaris rosea Mortensen 



Videnskabelige Meddelelser fra dennaturhistoriskeForeningiKjoben- 

 havn, bd. 85, p. 68, 1928. 



Syntype: 



MCZ 4861 (2 dry), Sagami Sea, Japan, 400 fms. 



Rhynchocidaris triplopora Mortensen 



Echinoiden de deutsche Sudpolar Expedition, p. 6, 1909. 



Syntypes: 



MCZ 2026 (1 dry), Gauss Winter Station, 195-212 fms. 



MCZ 7553 (1 dry), same as 2026. 



Rhynobrissus cuneus Cooke 



Proceedings of the U.S. National Museum, vol. 107, no. 3379, p. 9, 

 pL 1, 1957. 



Holotype: 



USNM E8032 (dry). Fort Macon, North Carolina, shore, January 1956, 

 collected by Maureen Downey. 



Paratype: 



USNM E8033 (1 alcohol), see above. 



Rhynobrissus macropetalus H. L. Clark 



Memoirs of the Museum of Comparative Zoology at Harvard, vol. 55, 

 p. 434, pL 28, figs. 8-9, 1938. 



Holotype: 



MCZ 7264 (dry), Broome, Western Australia, 1932. 



Rhynobrissus micrasteroides A. Agassiz 



Bulletin of the Museum of Comparative Zoology at Harvard, vol. 5, 

 p. 192, 1879. 



- Neopneustes micrasteroides (Agassiz)--see Mortensen's Monograph 

 of the Echinoidea, vol. 5, no. 2, p. 364. 



