1. UV radiation evokes negative phototaxis and covering behavior in the sea urchin Strongylocentrotus droebachiensis;Adams;Mar. Ecol. Prog. Ser.,2001
2. Preliminary report on the echini and star-fishes dredged in deep water between Cuba and the Florida Reef, by L.F. de Pourtalès, Assist. U.S. Coast Survey;Agassiz;Bull. Mus. Comp. Zool. Harvard,1869
3. Revision of the Echini;Agassiz;Mem. Mus. Comp. Zool. Harvard,1872
4. The Echini collected on the Hassler Expedition;Agassiz;Bull. Mus. Comp. Zool. Harvard,1873
5. Report on the Echini;Agassiz;Report on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico, by the United States Coast Survey Steamer Blake, Lieut.-Commander C.D. Sigsbee, U.S.N., Commanding. II. Bull. Mus. Comp. Zool. Harvard,1878