THE CAMPANULARIDJE AND THE BONNEVIELLID^. 51 



The sterile and reproductive hydree are found on the sides of the main stem, attached by a very short pedicel, and alter- 

 nate so regularly on each side that its Campanularian nature is noticed only after a careful examination. The sterile 

 hydrse resemble those of Laomedea amphora, while the reproductive calycles are identical in shape with those of Obelia 

 commissuralis. The main stems of a cluster are crowded together, and attain a height of three to four inche^i. 



Distribution. — Type-locality is San Francisco, California. 



As indicated above this description could well be applied to Clytia hakeri, but there is 

 nothing to indicate whether it is a Campanularia or a Clytia. No illustration is available for 

 this species. 



CAMPANULARIA ANGCTLATA (Hincks). 



Plate 10, fig. 1. 



Laomedea angulata Hincks, Cat. Zooph. South Devon and Cornwall, Ann. Mag. Nat. Hist., ser. 3, vol. 8, 1861, p. 261. 

 Loamedea angulata Allman, Construction and Limitation of Genera among the Hydroids, Ann. Mag. Nat. Hist., ser. 



3, vol. 13, 1864, p. 373. 

 Campanularia angulata Hincks, British Hydroid Zoophytes, 1868, p. 170. 

 Campanularia angulata Vereill, Proc. Amer. Ass. Adv. Sci., 1873, p. 364. 

 Campanularia angulata Winther, Fortegnelse over de i Danmark Hydroider, 1879-80, p. 239. 

 Campanularia angulata Fraipont, Ann. Mag. Nat. Hist., ser. 5, vol. 5, 1880, p. 265. 

 Campanulana angulata de Varennb, Sur la Reproduction des Polypes Hydraires, 1882, p. 77. 

 Campanularia angulata Crawford, Aim. Mag. Nat. Hist., ser. 6, vol. 16, 1895, p. 260. 

 Campanularia angulata Nutting, Hydroids of the Woods Hole Region, 1901, p. 347. 

 Campanularia angulata Hargitt, Synopsis of N. A. Invert., 1901, p. 385. 

 Campanularia angulata Villard, Contributions k I'^tude des Hydroides, 1904, pp. 47, 65, 173. 

 Campanularia angulata Bedot, Hydroides de Roscoff, 1911, p. 219. 

 Campanularia angulata Fraser, New England Hydroids, 1912, p. 43. 



Trophosome} — Colony 1.4 cm. in height and consisting of a number of stems arising from 

 a creeping rootstock. Stems usually simple but not seldom branched, in which case the branches 

 resemble the stems. Stems geniculate, divided into regidar long internodes, each of which 

 bears a pedicel at its distal end and two or three annulations on its proximal end. Pedicels 

 alternate, often as long as the hydrothecse, and annulated throughout. They often diminish in 

 diameter from the proximal to the distal end. Hydrothecse campanulate, deeper than broad 

 (1^ times as deep as broad) with an even rim which is hardly at aU everted. The diaphragm 

 is distinct and the basal cavity rather deep. 



Gonosome. — Gonangia borne on the rootstock, elongate oval in shape; but with the walls 

 often irregularly distorted by the pressure of the gonangial contents. There is a round terminal 

 aperture with hardly any evident neck or collar. The contents are developing ova or sperma- 

 tozoa without trace of medusoid structure. 



Distribution. — The tjrpe-locality is Isle of Man, on Zostera marina. It has also been reported 

 from Jei"sey (Norman) ; St. Andrews Bay, Scotland, and North of Ireland (W. Thomson) ; other 

 European localities are Denmark (Winther); coast of France (de Varenne). 



The only reported occurrences of this species in American waters are Woods Hole, 

 Massachusetts (Nutting), and Casco Bay, Maine (Fraser). 



The greatly produced terminal branch, etc., described by Hincks has been studied by de 

 Varenne under the name "Organe en forme de vrille." This appears to be somewhat similar 

 to the phenomena discussed by the author under the head of " Stolonif erous Reproduction" 

 in his American Hydroids, Part I, the Plumularidse, 1900, p. 42. These structures were not 

 found in the specimens from Woods Hole. 



CAMPANULARLA CORONATA Clarke. 



Plate 10, figs. 2-4. 

 Campanularia coronata Clarke, Bull. Mus. Comp. Zool., vol. 5, No. 10, 1879, p. 242. 



Trophosome.^ — Colony consisting of a creeping rootstock growing over a woody stem. 

 Rootstock undulating but not regularly annulated. Pedicels unbranched, sometimes attaining 



' Description of a specimen collected by the author at Woods Hole, Massachusetts. 

 ' Description of specimen collected by Lieut. J. F. Moser on the coast of Florida. 



