88 U.S. NATIONAL MUSEUM BULLETIN 264 



Toxopneustes chlovacanthus H. L. Clark 



Memoirs of the Museum of Comparative Zoology at Harvard, vol. 34, 

 no. 4, p. 283, 1912. 



= Toxopneustes pileolus — see Mortensen's Monograph of the Echinoidea, 

 vol. 3, no. 2, p. 473. 



Holotype and Paratypes: 



MCZ 1344 (3 dry), Samoa (largest is holotype). 



Tvetocidaris duhia H. L. Clark 



Bulletin of the Museum of Comparative Zoology at Harvard, vol. 51, 

 no. 7, p. 204, pi. 6, figs. 3-4, 1907. 



= Hesperocidaris dubia (Clark) — see Mortensen's Monograph of the 

 Echinoidea, vol. 1, p. 419. 



Holotype: 



USNM 27301 (dry), Albatross Sta. 3397, off Galera Point, Ecuador, 

 7033'N., 78O34'20"W., 85 fms., Mar. 11, 1891. 



Paratypes: 



MCZ 160 (3 dry). Albatross Sta.. 3397, see above. 



MCZ 60 (1 alcohol). Albatross Sta. 3378. 



Tretocidaris perplexa A. Agassiz and H. L. Clark 



Memoirs of the Museum of Comparative Zoology at Harvard, vol. 34, 

 no. 1, p. 205, pi. 6, figs. 1-2: pi. 7, figs. 1-4, 1907. 



= Hesperocidaris perplexa (Agassiz and Clark) — see Mortensen's Mono- 

 graph of the Echinoidea, vol. 1, p. 421. 



Holotype: 



MCZ 188 {dry), Albatross Sta. 2999, Gvilf of California, 39 fms., Mar. 

 16, 1886. 



Paratype: 



MCZ 329 (1 dry), Albatross, Clarion Island, Mexico. 



Trigonocidaris albida A. Agassiz 



Bulletin of the Museum of Comparative Zoology at Harvard, vol. 1, 

 p. 263, 1869. 



Syntypes: 



MCZ 1401 (1 dry), off Sand Key, Florida, 154 fms., Pourtales collec- 

 tion, 1869. 



MCZ 1403 (1 dry), off Grenada, 129 fms., Blake Sta. 259. 



MCZ 1407 (3 dry), off Sombrero Key, Florida, 123-125 fms. 



MCZ 2884 (13 alcohol), off Sand Key, Florida, 119-138 fms., Pourtales 

 collection. 



MCZ 2885 (8 alcohol), off the Samboes, 123-125 fms. 



MCZ 2887 (2 alcohol), off Conch Reef, Florida, 40 fms. 



