HYDROIDA II 



J 59 



furnished with seven to ten broad, slightly prominent teeth. The opening part curving more strongly out 

 between the teeth, we have a broad furrow running from the highest point of the teeth and continuing 

 some way down the hydrotheca, where it disappears. The longitudinal axis of the hydrothecse is often 

 somewhat curved. The basal cavity is very small, bounded at the top by a sharply defined, fairly 

 prominent ring-shaped thickening of the inner wall. 



The gouothecce are attached to the stolons by a short, often rudimentary stalk. They are egg- 

 shaped to oval, attached to the stalk by their broad end, and running out distally to a fairly long, 

 narrow cylindrical neck. The gonotheca: are often slightly bent, and faintly and irregularly wrinkled 

 transversely. 



Material : 



Greenland : Store Hellefiskebanke, depth 24 fathoms. 



The above-noted synonym Campanularia magnified Fraser (1917 p. 164, pi. n. figs. 1—3) ought 

 not really to require any further explanation. Fraser (1917 pi. 11, fig. 4} figures for purposes of com- 

 parison a gonotheca of Campanularia speciosa from Alaska; this is, like the one shown by Levin- 

 sen (1893 pi. 5, fig. 7) a developmental stage, only a little younger still. I have previously described 

 the fulh' developed gonotheca after specimens from the Kara Sea (191 2 p. 18 fig. 3); the conformity 

 with Eraser's pi. 11 fig. 2 is evident. The other distinctive characters noted by Fraser are void of 

 all significance, as will be seen from a somewhat richer material of the species. 



Campanularia speciosa is a panarctic species, belonging to the shallower parts of the littoral 

 region. Within the areas investigated, it is only known from West Greenland, where its most south- 

 erlv occurrence was noted on the Store Hellefiskebanke. 



Campanularia integra Mac Gillivray. 

 1842 Campanularia integra, Mac Gillivray, Catalogue of the marine Zoophytes of the neighbourhood 



of Aberdeen, p. 465. 

 1853 caliculata, Hincks, Further notes on British Zoophytes, p. 178, pi. 5, fig. B. 



1876 compressa, Clark, Report on the Hydroids .... Alaska, p. 214, pi. 8, figs. 5 — 6. 



1901 Ritteri, Nutting, Papers from the Harriman Alaska Expedition, p. 171, pi. 17, fig. 5. 



1915 — — Nutting, Campanularidae, p. 35, pi 2, fig. 2. 



1915 integra, Nutting, 1. c. p. 33, pi. 1, fig. 7, pi. 2, fig. 3. 



1915 Orthoj>yxis caliculata, Nutting, 1. c. p. 64, pi. 15, fig. 4. 

 1915 — compressa, Nutting, I.e. p. 65, pi. 15, figs. 5—10. 



Creeping colonies, from the stolons of which proceed hydrotheca stalks, smooth, or more or 

 less distinctly ringed or spirally coiled, especially near their origin, and close under the hydrotheca; 

 the stalk here always terminates in a ball-shaped joint. The hydrothecae are large, inversely conical 

 to nearly cvlindrical; the conical ones taper gently down throughout their whole length towards the 

 stalk; otherwise, the hydrotheca: are rounded smoothly off at their basal part; every possible kind of 

 intermediate form may be found. The hydrotheca margin is smooth, with no indication of teeth, 



