[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, 1882 ; 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, oif Gay Head ; abundant 

 on the timbers of the wharves at Eastport, Maine. 



OBELIA DIAPHANA Yerrill. (p. 327.) 



Thaumantias diapliana Agassiz, Mem. Amer. Acad., voL.iv, p. 300, figs. 1, 2, 1849 

 (? non Morch). Europe 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. Abundant in New Haven 

 Harbor and Vineyard Sound, on Zostera, Fucus, etc. 



OBELIA GENICULATA Allman. (p. 407.) 



Annals and Mag. Nat. Hist., vol. xiii, May, 1864 (t. Hincks) ; Hincks, Brit. Hyd- 

 Zoophytes, p. 149, Plate 25, fig. 1, 1868. SertulariageniculataLi\nu6, 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. Zooph., ed. 

 ii, p. 103, Plate 25, figs. 1, 2. Eueope diaphana (pars) Agassiz, Contributions, 

 vol. iv, p. 322, Plate 34, figs. 1-9, 1862. Eucope alternata A. Agassiz, Catalogue 

 p. 86, 1865. 



Long Island Sound to Labrador. Northern Europe, from North Cape 

 to Great Britain. Common near New Haven ; at Thimble Islands ; 

 Watch Hill, Ehode Island ; Vineyard Sound, 4 to 15 fathoms ; Massa 

 chusetts Bay ; Casco Bay ; Bay of Fundy, and northward, low-water to 

 40 fathoms, on Laminaria, Rlwdymenia, etc. 



OBELIA POLYGENA Verrill. 



Eucope poli/gena A. Agassiz, Catalogue, p. 88, 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. Eucope ? divaricata A. Agassiz, 

 Catalogue, p. 91, 1865. 



Charleston, South Carolina (McCready, Agassiz). A few specimens 

 were found on floating alga3 in Vineyard Sound, which appear to belong 

 to this species. It is closely allied to 0. fusiformis (A. Agassiz, sp.). 



OBELIA PYRIFORMIS Verrill. (p. 390.) 



Catalogue, p. 88, figs. 127-129, 1865. Laomedea gelatinosal^Qidy, 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 

 inedusre have sixteen tentacles when set free, and the reproductive 

 capsules differ slightly in form. 



