434 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. [728] 



OBELIA DICHOTOMA Hincks. (p. 407.) 



Brit. Hydroid Zoophytes, p. 156, Plate 28, fig. 1 , 1868. Sertularia dichotoma Linntf, 

 Syst. Nat., ed. x, sp. 24 ; ed. xii, sp. 22, p. 1312. Laomedea dichotoma, var. a, 

 Johnston, Brit. Zooph., ed. ii, p. 102, Plate 26, figs. 1, 2. 



Vineyard Sound, northward; northern COP ft* of Europe to Great 

 Britain. Off Gay Head, 8 to 10 fathoms, cr ^scidiansj Eastport, 

 Maine. 



OBELIA LONGISSIMA Hincks. 



Brit. Hydroid Zooph., p. 154, Plate 27, 1868. Sertu'i c . "wr songissima Pallas, Elench. 

 Zooph., p. 119, 1766 (excl. synonymy). Laomedea longissima Alder, Trans. 

 Tynes. F. C., vol. iii, p. 121 (t. Hincks). Laomedea dichotoma, var. 6, Johnston, 

 Brit. Zooph., ed. ii, p. 102. Campannlaria gelatinosa Van Beueden, Me"in. stir le 

 Campan., p. 33, Plates 1, 2 (t. Hincks). 



Gay Head ; Cape Ann, Massachusetts ; Bay of Fundy. Coasts of 

 Belgium and Great Britain. 



OBELIA FLABELLATA Hincks. (p. 390.)' 



Brit. Hydroid Zooph., p. 157, Plate 29, 1868. Campanularia flalellata Hincks, 

 Ann. and Mag. Nat. Hist., ser. iii, vol. xviii, p. 297. 



Off Thimble Islands, 4 to 5 fathoms, on Astrangia ; Watch Hill, Khode 

 Island, on Laminaria ; Wood's Hole, on old wreck, in the passage. 

 Coasts of Great Britain. 



The hydrarium of this species very closely resembles the Obelia com- 

 missuralis of Agassiz, and may prove to be identical with it. But the 

 original 0. commissuralis of McCready, from Charleston, South Carolina, 

 is, perhaps, distinct from that described by Agassiz. 



OBELIA COMMISSURALIS McCready. Plate XXXVII, fig. 281. (p. 327.) 



Proc. Elliott Soc., vol. i, p. 197, Plate 11, figs. 5-7, 1859 ; (?) Agassiz, Contribu- 

 tions, vol. iv, pp. 315, 351, Plate 33 (except fig. 2), Plate 34, figs. 10-21, 1862 ; 

 (?) A. Agassiz, Catalogue, p. 91, fig. 134. Laomedea dichotoma Leidy, op. cit., p. 

 138. Plate 11, fig. 36 (not Linn6, sp.). ? Laomedea gelatinosa Stimpson, Invert, 

 of Grand Manan, p. 8, 1853 (not Pallas, sp.). 



Charleston, South Carolina (McCready). New Jersey (Leidy). New- 

 port, Ebode Island, and Nahant, Massachusetts (A. Agassiz). New 

 Haven Harbor, on piles ; Vineyard Sound, on floating algae. Grand 

 Manan (Mills, t. A. Agassiz). 



The northern specimens possibly belong to the preceding species. 



OBELTA GELATINOSA Hincks. (p. 391.) 



British Hydroid Zoophytes, p. 151, Plate 26, fig. 1, 1868. Sertularia gelatinosa 

 Pallas, Elench. Zooph., p. 116, 1766. Laomedea gelatinosa Lamouronx, Polyp 

 Flex., p. 92 ; Johnston, Brit. Zooph., ed. ii, p. 104, Plate 27, fig. 1 (var. 6). 

 Campanularia gelatinosa Lamarck, Anim. sans Vert., ed. ii, p. 134 (t. Hincks). 

 Laomedea gigantea A. Agassiz, Catalogue, p. 86, 1865. 



New Jersey to Massachusetts Bay $ northern coasts of Europe, from 

 North Cape to Belgium and Great Britain ; low- water to 20 fathoms. 

 Great Egg Harbor, New Jersey, on oysters; New Haven, on piles of 

 Long Wbarf, abundant. Mouth of Charles Eiver, near Boston (H. J. 

 Clark, t. A. Agassiz). 



