246 BENNITT. 



forms are shown to belong to the same species by the presence of the 

 characteristic female gonosome on both. One form is short and 

 scrubby, the other longer and with a few irregular branches coming 

 off just below the hydrophores. The trophosome of the latter variety 

 agrees so well with what Fraser (1912, p. 368, fig. 30) doubtfully 

 called H. repens Jaderholm, that I believe the two are identical, and 

 that he observed this straggling variety of H. nanum. 



Halecium tenellum Hincks. 



Hincks, 1861, p. 252, pi. 6, figs. 1-4. 

 Hincks, 1868, p. 226, pi. 45, fig. 1. 

 Nutting, 1901, p. 357, fig. 52. 

 Fraser, 1912, p. 369, fig. 31. 

 Stechow, 1919, p. 41. 



A few colonies were found, in all stages of growth, on Sargassum at 

 Somerset Bridge, the hydrorhiza forming an extensive network over 

 an alga. The gonosome, essential for a satisfactory determination 

 of the species, which Fraser failed to find in his Beaufort specimens, 

 was present in the Bermuda material. 



Family CAMPANULARIDAE. 

 Genus Campanularia. 



Campanularia marginata (Allman). 



Obelia marginata, Allman, 1877, p. 9, pi. 6, figs. 1, 2. 

 Campanularia insignis, Congdon, 1907, p. 469, figs. 10, 12. 

 Leptoscyphus insignis, Ritchie, 1909, p. 3. 

 Campanularia marginata, Nutting, 1915, p. 44, pi. 6, figs. 5-7. 



Campanularia raridentata Alder. 



Alder, 1862, p. 315, pi. 14, fig. 5. 

 Fraser, 1912, p. 357, fig. 14. 

 Nutting, 1915, p. 39, pi. 4, fig. 1. 



A single small colony of two or three individuals was found on float- 

 ing Sargassum. Identification is somewhat doubtful, owing to the 

 absence of the gonosome, but the trophosome agrees in every way 

 with Nutting's description. The ten pointed teeth, the 3-5 annula- 



