[727] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 433 
Laomedea amphora Agassiz, Contributions, vol. iv, pp. 311, 314, fig. 50, p. 352, 
Plate 30, Plate 31, figs. 1-8, 1862; A. Agassiz, Catalogue, p. 93. 
Long Island Sound to Gulf of Saint Lawrence; northern coasts of 
Europe, Isle of Man. New Haven, on piles of Long Wharf; Thimble 
Islands, near New Haven; Vineyard Sound, off Gay Head; abundant 
on the timbers of the wharves at Eastport, Maine. 
OBELIA DIAPHANA Verrill. (p. 327.) 
Thaumantias diaphana Agassiz, Mem. Amer. Acad., vol. iv, p. 300, figs. 1, 2, 1849 
(2 non Mirch). Eucope diaphana (pars) Agassiz, Contributions, vol. iv, Plate 
33, fig. 2, 1862; A. Agassiz, Catalogue, p. 83, figs. 115-125. 
Long Island Sound to Massachusetts Bay. Abundantin New Haven 
Harbor and Vineyard Sound, on Zostera, Fucus, ete. 
OBELIA GENICULATA Allman. (p. 407.) 
Annals and Mag. Nat. Hist., vol. xiii, May, 1864 (t. Hincks); Hincks, Brit. Hyd. 
Zoéphytes, p. 149, Plate 25, fig. 1, 1868. Sertularia geniculata Linné, Syst. Nat., 
ed. x, sp. 23; ed. xii, sp. 21, p. 1312; Pallas, Elench. Zooph., p. 117, 1766, 
Laomedea geniculata Lamouroux, Pol. Flex., p. 208; Johnston, Brit. Zobph., ed. 
ii, p. 103, Plate 25, figs. 1,2. Hucope diaphana (pars) Agassiz, Contributions, 
vol. iv, p. 322, Plate 34, figs. 1-9, 1862. Eucope alternata A. Agassiz, Catalogue : 
p- 86. 18£5. 
Long Island Sound to Labrador. Northern Europe, from North Cape 
to Great Britain. Common near New Haven; at Thimble Islands ; 
Watch Hill, Rhode Island; Vineyard Sound, 4 to 15 fathoms; Massa- 
chusetts Bay; Casco Bay; Bay of Fundy, and northward, low-water to 
40 fathoms, on Laminaria, Rhodymenia, ete. 
OBELIA POLYGENA Verrill. 
Eucope polygena A. Agassiz, Catalogue, p. 86, fig. 126, 1865. : 
Off Gay Head, 4 to 5 fathoms, not common. Nahant, Massachusetts 
(A. Agassiz). 
OBELIA DIVARICATA Verrill. 
Laomedea divaricata McCready, op. cit., p. 195, 1859. EHucope ? divaricata A. Agassiz, 
Catalogue, p. 91, 1865. 
Charleston, South Carolina (McCready, Agassiz). A few specimens 
were found on floating alge in Vineyard Sound, which appear to belong 
to this species. It is closely allied to O. fusiformis (A. Agassiz, sp.). 
OBELIA PYRIFORMIS Verrill. (p. 390.) 
Catalogue, p. 88, figs. 127-129, 1865. Laomedea gelatinosa Leidy, Journ. Acad. Nat. 
Sci., Philad., ser. ii, vol. iii, p. 138, 1855 (not Pallas, sp.). 
Long Island Sound to Bay of Fundy. Very abundant on piles of 
wharves, etc., at Wood’s Hole. 
This species is closely allied to the following; in the latter the young 
meduse have sixteen tentacles when set free, and the reproductive 
capsules differ slightly in form. 
