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1867. Beitrage zur anatomie und systematik der holothurien. Zeit. f; w. 

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



C. Semper. 



1868. Reisen im arcliipel der Philippines 2 Theil. Wissenschaftliche 

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W. P. Sladen. 



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

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H. Th6el. 



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

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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 

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A. E. Verrill. 



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

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

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1871. Additional observations on echinoderms, chiefly from the Pacific 

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

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

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