722 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Long Island Sound 5 off Kew Haven, in 4 to 6 fathoms, mud ; off 

 Thimble Islands, 3 to 8 fathoms, soft mud, rare. 



This species is, in some respects, intermediate between AmphlphoUs 

 and Amphiura. With the former it agrees best in the number of the 

 arm-spines and general appearance ; but in the structure of the mouth- 

 parts it agrees better with the latter. It will, however, not go into any 

 of the sections or sub-sections established by Ljuugmann. It appears to 

 be more nearly allied to A. Eugenice Ljung., from La Plata, thau to any 

 other species hitherto described -, the latter has, however, four arm- 

 spines instead of three. 



ASTROPHYTON AGASSIZII StimpSOD. 



luvertebrata of Grand Mauan, p. 12, 1853 ; Lyman, Catalogue, p. 186. 

 This species was tirst described from a specimen obtained "not far 

 from the shoals of Nantucket," by Governor John Winthrop, in 1670 

 and 1671 (Philosophical Transactions), under the name of "Basket- 

 fish'" or "Net-fish." Crab Ledge, off Chatham, Massachusetts, (V. N. 

 Edwards.) It occurs on the banks east and north of Cape Cod, and 

 on Saint George's Bank, and is very common in the Bay of Fundy, 

 low-water to 110 fathoms ; and is especially abundant in Eastport 

 Harbor, in 10 to 20 fathoms. According to Dr. Liitken it is also 

 found at Greenland and Fin mark. 



CKINOIDEA. 

 Antedon dentatus Yerrill. 



Proc. Boston Soc. Nat. Hist., vol. x, p. 339, 1866. Aleclo dentata Say, Jonrn. 

 Acad. Nat. Sci., Philadelphia, vol. v, p. 153, 1825. 



This species was described by Say, from a specimen obtained at Great 



Egg Harbor, New Jersey. It may posf ibly occur on the southern coast 



of New England, but I am not aware that it has actually been found so 



far north. 



ACALEPH^. 



CTENOPHOR^. 



Mnemiopsis Leidyi a. Agassiz. (p. 449.) 



Illustr. Catal. Mus. Comp. Zoology, North American AcalephiP, p. 20, figs. 22-24, 

 18G5. 

 Buzzard's Bay and Vineyard Sound; Long Island Sound, off New 

 Haven. 



Lesueuria hyboptera a. Agassiz. (p. 454.) 



Catal. North American Acalephie, p. 23, figs. 2.5-28. 

 Newport, Rhode Island, to Massachusetts Bay (A. Agassiz). 



Pleurobrachia rhododactyla Agassiz. (p. 448.) 



Memoirs Amer. Academy, vol. iv, p. 314, Plates 1 to 5, 1849 ; Contributions to 

 Nat. Hist. U. S., vol. iii, pp. 203, 294, Plate 2% 1860; A. Agassiz, Catalogue, p. 

 30, figs. 38-51, 1865. 



Southern side of Long Island, to Greenland. Not uncommon in Long 



