THE CAMPANULAKIDiE AND THE BONNEVIELLID^. 49 



hydro thecse are triangular in outline, funnel-shaped, with an even margin, the diaphragm is 

 deUcate but evident and the basal chamber high. The hydranth is of the usual campanularian 

 type, with about 20 tentacles. 



Gonosome} — Gonangia borne on the stem near the axil of the pedicel, small, long, with 

 truncated distal end and gradually narrowing basally. There are two rows of ova developing 

 on the blastostyle and extending nearly its whole length, there being about 6 to each row, the 

 largest being at the top. 



Distribution. — Mediterranean at Messina (Sars) ; Belgium (van Beneden) ; British Coasts, 

 Dorset (Hincks) ; Puget Sound (Calkins) . 



So far as is known Puget Sound is the only American locality from which this species is 

 reported. It has not been reported from waters north of England in the Atlantic, and hence 

 has a very exceptional distribution. 



? CAMPANULARIA FRAGILIS (Hincks). 



Plate 9, fig. 1. 



Laomedea fragilis Hincks, Ann. Mag. Nat. Hist., ser. 3, vol. 11, 1863, p. 46. 

 Campanularia fragilis elongata van Beneden, Faune litt. de Belgique, Polypes, 1866, p. 164. 

 Campanularia fragilis Hincks, British Hydroid Zoophytes, 1868, p. 175. 

 Campanularia fragilis elongata Veeeill, Proc. Amer. Ass. Adv. Sci., 1873, p. 364. 



Trophosome.^ — Colony minute, consisting of a single flexuose stem which is unbranched 

 and is divided into rather obscure internodes, each of which bears a pedicel on a process from near 

 its distal end. Pedicels very short, less than half the length of the hydrotheca, annulated through- 

 ■ out and decreasing regularly in size from the proximal to the distal end. The hydrothecse are 

 quite small, tubular, about three times as high as wide, and with an even, noneverted rim. 

 There is a diaphragm low down toward the bottom of the hydrotheca. Hydranths with an ovoid 

 hypostome and about 20 tentacles. 



Gonosome . — Unknown . 



Distribution. — Type-locaUty, Ilfracombe ; British coast, Plymouth (Nutting) ; ? Coast of 

 Belgium (van Beneden) ; New England Coast (Verrill). 



This very well marked and dehcate little campanularian seems to have very generally 

 escaped notice on the British coast since Hincks wrote his great work on British Hydroid 

 Zoophytes in 1868. VerriU reports it, but does not give any description. 



CAMPANULARIA CALCEOLIFERA Hincks. 



Plate 9, figs. 2-4. 



Campanularia calceolifera Hincks, Ann. Mag. Nat. Hist., ser. 4, vol. 8, 1871, p. 78. 

 Campanularia calceolifera Clark, Hydroids from the New England Coast, 1876, p. 60. 

 Campanularia calceolifera Nutting, Hydroids of the Woods Hole Region, 1900, p. 348. 

 Campanularia calceolifera Hargitt, Synopsis of N. A. Invert., 1901, p. 386. 

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



TropJiosome.^ — Colony 2.9 cm. in height, consisting of a cluster of stems springing from a 

 creeping rootstock. Stems ordinarily unbranched but sometimes breaking up into several 

 branchlets which resemble the main stem; erect, flexuose, divided into regular internodes each 

 of which bears a pedicel on a shoulder projecting from near its distal end. There is a series 

 of three or four regular annulations on each internode just above this shoulder. The pedicels 

 are regularly alternate, usually shorter than the hydrothecas. Hydrothecse campanulate with 

 slightly flaring margins and an even rim. They are one and a half times as deep as wide at the 

 margin and have a distinct diapkragm and a deep basal chamber. The hydranth has a trumpet- 

 shaped proboscis and about 20 tentacles. 



' There is a single gonangium on the specimen, which was overlooked by Calkins in his description. 



^ Description of specimen collected at Plymouth, England, by the writer. 



' Description of colony collected at Woods Hole, Massachusetts, by Mr. George Gray. 



