ECHINODERMATA. 7 



OPHIUROIDEA . OPHIURAE. 



AMPHIURIDAE. 



2, p, 132. "Off Thimble Islands and Savin Rock, near 

 New Haven, in 3 to 6 fathoms, muddy bottom." Invert, 

 anim. Vineyard Sound, 1873, p. 720. 



Long Island Sound ; in 3-8 fathoms. 



OPHIACANTHIDAE. 



22 (8). Ophiacantha bidentata (Retzius) Ljungman. 



Ophiaccmtha sjnmdosa Lyman, 111. cat. [Mem.] mus. comp. 

 zool., 1865, vol. 1, p. 93, tigs. 6-7. 



Asterias bidentata Retzius, Dissert. Asterianum, 1805, p. 33. 

 "Mari Norwegico." 



Casco Bay, Maine, and northward; in 15 fathoms or more. 



EURYALAE. 

 GORGONOCEPHALIDAE. 



23 (9). Gorgonocephalus agassizii (Stimpson) Lyman. 



Basket-fish. 



Clark, Bull. U. S. fish comm. for 1902, 1904, vol. 22, p. 561, 

 pis. 6, figs. 35-36; pi. 7, figs. 45-47. 



Astrophi/ton agassizii Stimpson, Invert. Grand Manan, 1853, 

 p. 12. "Grand Manan. . . . coraline zone." 



Off Nantucket and northward ; low water mark (northerly) to 

 far beyond the 50 fathom line. 



ECHINOIDEA. EUECHINOIDEA. DIADEMATOIDA. 



ECHINOMETRIDAE. 



24 (1). Strongylocentrotus drobachiensis (O. F. Miiller) 



A. Agassiz. 



Green sea-urchin. 



A. Agassiz, Rev. Echini, 1872, p. 162, 277 ; pi. 4% figs. 2-4. 



