THE CAMPANULAEIDiE AND THE BONNEVIELLIDjE. 89 



Laomedea gelatinosa Saes, Bidrag til kundskaben om middlehavets Littoral Fauna, Nyt Magazin for Naturvidenska- 

 berne, vol. 3, 1857, p. 159. 



Laomedea gelatinosa Aldee, Cat. Zooph. Nortbiimb. and Durham, 1858, p. 33. 



Laomedea gelatinosalLiNCKS, Cat. Zooph. South Devon and South Cornwall, Ann. Mag. Nat. Hjst., ser. 3, vol. 8, 1861, 

 p. 155. 



Laomedea gelatinosa Kiechenpauee, Die Seetonnen der Elbmiindung, 1862, p. 6. 



Laomedea flemingii, Kiechenpauee, Die Seetonnen der Elbmiindung, 1862, p. 22. 



Laomedea gelatinosa PACKAED,.List of Animals dredged near Caribou Island, S outhem Labrador, Can. Nat. and Geolo- 

 gist, vol. 8, 1863, p. 4. 



Sertularia gelatinosa Allman, Notes on the Hydroida, Ann. Mag. Nat. Hist., ser. 3, vol. 14, 1864, p. 62. 



Laamedea pacifica A. Agassiz, North Amer. Acalaphse, 1865, p. 94. 



Laomedea gigantea A. Agassiz, North Amer. Acalephse, 1865, p. 94 



Laomedea gelatinosa McIntosh, Observations on the Marine Zoology of Northwest Outer Hebrides, Proc. Roy. Soc, 

 Edinb., vol. 5, 1866, p. 602. 



Laomedea gelatinosa Heller, Zoophyten und Echinodermen, 1868, p. 45. 



Ohelia gelatinosa Hincks, British Hydroid Zooph., 1868, p. 151. 



Cam.panularia gelatinosa Donitz, Sitzber. d. Ges. Naturforsch., 1869, p. 11. 



Ohelia gelatinosa Norman, Shetland final Dredging Report, II, Rept. 38th Meeting Brit. Ass. Adv. Sci., 1869, p. 322. 



Campanularia gelatinosa Metzger, Die wirbellosen Meeresthiere der ostfriesischen Kiiste, 1871, p. 35. 



Ohelia gelatinosa Veerill, Invertebrate Animals of Vineyard Sound, 1873, p. 728. 



Ohelia gelatinosa Schulzb, Nordsee Exped., 1874, p. 129. 



Ohelia gelatinosa Beegh, Gopelpolyper fra Kara-Havet, 1877, p. 333. 



Ohelia gelatinosa Winthbr, Fortegnelse over de i Danmark Hydroiden, 1879-80, p. 236. 



Ohelia gelatinosa Fbwkes, Guide to Collector, Bull. Essex, Inst., vol. 23, 1891, p. 23. 



Laomedea (Ohelia) gelatinosa Levinsen, Aunulata, Hydroidse, Anthozoa, Porifera, Videnskab. Udb. Hauchtogter, 1893, 

 p. 369. 



Ohelia castellata Clark, Bull. Mus. Comp. Zool., vol. 25, 1894, p. 73. 



Ohelia gelatinosa Calkins, Some Hydroids from Puget Sound, 1896, p. 357. 



Ohelaria gelatinosa Hartlaub, Die Hydromedusen Helgolands, 1897, p. 488. 



Campanularia gelatinosa Bonnevie, Hydroids of the Norwegian North Atlantic Exped., 1899, p. 71. 



Ohelaria gelatinosa Haetlaub, Hydroiden aus dem Stillen Ocean, 1901, p. 353. 



Ohelia gelatinosa Haegitt, Synopsis N. A. Invert., Hydromedusee, pt. 2, Amer. Nat., vol. 35, 1901, p. 383. 



Ohelia gelatinosa Nutting, Hydroids of the Woods Hole Region, 1901, p. 351. 



Ohelia gelatinosa Whiteaves, A catalogue of the Marine Invertebrata of Eastern Canada, 1901, p. 23. 



Ohelia gelatinosa Jaderholm, Aussereuropaische Hydroiden, 1905, p. 271. 



Campanularia gelatinosa Jaderholm, Northern and Arctic Invert,, pt. 4, Hydroiden, 1909, p. 70. 



Laomedea gelatinosa Broch, Die Hydroiden der arktischen Meere, 1909, p. 226. 



Ohelia gelatinosa Mater, Medusae of the World, vol. 2, The Hydromedusse, 1910, p. 244. 



Ohelia gelatinosa Eraser, West Coast Hydroids, 1911, p. 39. 



Ohelaria gelatinosa Stechow, Hydroiden der Mtinchener Zoologischen Staatssammlung, 1912, p. 356. 



Trophosome} — Colony 14.5 cm. in height, consisting of a central stem from which branches 

 are given off on four sides and nearly at right angles with the stem. The branches are usually 

 in pairs, each pair being at right angles with the one above and below. The stem and larger 

 branches are polysiphonic, composed of an aggregation of slender tubes, some of which have a 

 hydrotheca at one end and a partially free lobulated termination at the other, as if they were 

 glued on to the stem or branch. The main branches ramify profusely so that the ultimate 

 branches form rather close clumps. The terminal twigs are fihform, often geniculate and bear 

 alternate pedicels above each of which is a group of annulations. The pedicels are short, usually 

 considerably shorter than the hydrothecse, annulated throughout and decreasmg in diameter 

 from the proximal to the distal end. The hydrothecse are small and dehcate, campanulate and 

 their margins bear about 8 to 10 turreted teeth, each of which is either square on top or with two 

 distal denticles. The diaphragm is evident and of the usual campanularian type. 



Gonosome. — The gonangia are borne in the axils of the branches and pedicels, are oblong- 

 ovate in form, averaging about three times as long as broad, and have usually a narrow collar 

 and a comparatively large aperture. They contain developing ova or spermaries and not de- 

 veloping medusae. 



' Description of a specimen from the Marine Biological laboratory at Plymouth, England. 



