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E. Selenka. 



1867. Beitrage zur anatomic und systematik der liolothurien. Zeit. f. w. 

 Zool., 17, p. 291-374, pis. 17-20." 



1868. Nachtrag dazu. Zeit. f. w. Zool., 18, p. 109-119, pi. 8. 



C. Semper. 



1868. Reiseu im arcliipel der Philippine!!. 2 Theil. Wissenscliaftliclie 

 resultate. Bd. 1. Holotlmrien. 288 pp., 40 pis. 



W. P. Sladen. 



1889. The voyage of H. M. S. Challenger. Zoology. 30. Report on 

 the Asteroidea. 935 pp., 118 pis., in two volumes. 



H. Th<el. 



1886. The voyage of H. M. S. Challenger. Zoology. 14, pt. 39. Report 

 on the Holothurioidea, part 2. 290 pp., 16 pis. 



F. Troschel. 



1846. Neue holothurien-gattungen. Arch. f. Naturg., 12, bd. 1, p. 60-66. 



A. Valenciennes. 



1846. Voyage autour du monde sur la fregate La Venus pendant les 

 annees 1836-39. Atlas 4: Zoophytes. 



A. E. Verrill. 



1867. Notes on the echinoderms of Panama and west coast of America, 

 with descriptions of new genera and species. Trans. Conn. Acad., 1, 

 p. 251-322. 



1868. Notice of a collection of echinoderms from La Paz, Lower Cali- 

 fornia, with descriptions of a new genus. Trans. Conn. Acad., 1, 

 p. 371-376. 



1871. Additional observations on echinoderms, chiefly from the Pacific 

 coast of America. Trans. Conn. Acad., 1, p. 568-593. 



1899. Revision of certain families and genera of West Indian ophiurans. 

 Trans. Conn. Acad., 10, p. 301-371, pis. 42 and 43. 



1901. Additions to the fauna of the Bermudas. Trans. Conn. Acad., 11, 

 p. 15-62. 



