44 AMERICAN HYDKOIDS. 



? CAMPANULARIA GIGANTEA Hincks. 



Plate 6, fig. 3. 



CamparvuMria gigantea Hincks, Ann. Mag. Nat. Hist., ser. 3, vol. 18, 1866, p. 297. 



Campanularia gigantea Hincks, British Hydroid Zoophytes, 1868, p. 174. 



Campanularia gigantea Verrfll, Check-list of the Marine Invert. 1879, p. 16. 



Campanularia gigantea Jaderholm, Northern and Arctic Invert., pt. 4, Hydroiden, 1909, p. 69. 



The writer never having seen this species contents himself with quoting the description 

 given by Hincks in his British Hydroid Zoophytes (p. 174): 



Stems deUcate, of a very light horn-colour and papyraceous texture, annulated at the base and below the calycle, 

 irregularly and sparingly branched; branches erect, copies of the primary shoot, sometimes themselves branched; 

 hydrothecffi of enormous size, deeply campanulate, very wide at the top and for some way below it, and then tapering 

 off gradually, length about double the greatest width, the rim cut into broad and blunt teeth ; gonothecse unknown . 



Distribution. — Lamlash Bay, Arran, Great Britain (Hincks); Mediterranean (Pieper); 

 Atlantic Coast North America (Verrill) ; West Coast of Sweden (Jaderhohn) . 



The gonosome being unknown, the genus in which this species should be placed is iade- 

 terminable. 



? CAMPANULARIA OBTUSIDENS Jaderholm. 



Plate 6, fig. 4. 

 Campanularia ohtusidens Jaderholm, Hydroiden aus den Ktisten von Chile, 1904, p. 2. 



The writer has not seen specimens of this species and confines himseK to a somewhat 

 condensed and free translation of the original description by Jaderholm. 



Trophosome. — Colonies a height of 3 cm., growing from a creeping rootstock on a tubu- 

 larian stem. The stems are strongly geniculate and give forth many regularly alternating 

 branches in the same plane. The individual internodes of the latter are strongly annulated 

 proximally and from the distal end of each springs either a twig or a pedicel. Internodes 1 to 

 1.5 mm. long. The younger internodes are more slender. Hydrothecse are 0.3 mm. to 0.6 mm. 

 long with alternating pedicels, the shorter pedicels being annulated throughout while the longer 

 ones are annulated at the end with a smooth middle portion. Hydrothecse beU-shaped, thick- 

 waUed, margin 0.45 mm. in diameter. There are usually 12 broad, low, rounded teeth and the 

 hydrothecse are ornamented with longitudinal lines as in 0. Mncksii Alder, extending from 

 the margin to the middle or a httle below. Diaphragm thin, often oblique. 



Gonosome. — ^Wanting. 



The type and only known locahty is Guaitecas Island, Mehnca, Chile, 10 to 15 fathoms. 



CAMPANULARIA MARGINATA (Alhnan). 



Plate 6, figs. 5-7. 



Ohelia marginata Allman, Memoirs Mus. Comp. Zool., vol. 5, No. 2, 1877, p. 9. 



Obelia marginata Clarke, Bull. Mus. Comp. Zool., vol. 5, No. 10, 1879, p. 241. 



Ohelia m,arginata Fewkes, Bull. Mus. Comp. Zool., vol. 8, No. 7, 1881, p. 128. 



Campanularia insignis Allman, Challenger Reports, Hydroida, pt. 2, 1888, p. 19. 



Obelia marginata Versluys, Hydraires Calyptoblastes dans la Mer des Antilles, 1899, p. 30. 



Obelia marginata Jaderholm, Aussereuropiiische Hydroiden, 1903, p. 269. 



Obelia marginata Nutting, Narrative Bahama Exped., 1905, p. 87. 



Campanularia insignis Congdon, Hydroids of Bermuda, 1907, p. 469. 



Leptoscyphus insignis Ritchie, Two unrecorded Challenger Hydroids from the Bermudas, 1909, p. 3. 



Lyloscyphus marginatum Billard, Hydroides du British Musi^um, 1910, p. 8. 



Trophosome.^ — Colony with a straggling habit, attaining a height of 20 cm. The main stem 

 is straight and continuous to the top of the colony, giving off lateral branches throughout its 

 length, some of which bear branchlets. The branches are rather stiff in habit and undulating 

 almost to the point of geniculation throughout, divided into regular internodes each of which 



'Description of a colony from Albatross station 2406, Gulf of Mexico, lat. 28° 46' N.; long. 84° 49' W., depth 

 26 fathoms. 



