HYDROID FAUNA OF THE BERMUDAS. 249 



Obelia hyalina Clarke. 



Obelia hyalina, Clarke, 1879, p. 241, pi. 4, fig. 21. 

 Obelia hyalina, Congdon, 1907, p. 468, figs. 7-9. 

 Obelia congdoni, Hargitt, 1909, p. 375. 

 Obelia hyalina, Fraser, 1912, p. 363, fig. 24. 

 Obelia hyalina. Nutting, 1915, p. 76, pi. 18, figs. 6, 7. 



This is one of the hydroids found most often on the floating Sar- 

 gassum, and a number of colonies 2-3 cm. high were found on a fish-car 

 at Agar's Island. There were many cases of stolon-formation from the 

 ends of the branches, and in one case these stolons were thickly inter- 

 twined with similar stolons of Aglaophenia minuta. Obelia hyalina 

 often grows far out on colonies of Sertularia stookeyi no larger than 

 itself. 



Family LAFOEIDAE. 

 Genus Lafoea. 



Lafoea venusta Allman. 



Allman, 1877, p. 11, pi. 6, figs. 3-4. 

 Ritchie, 1909, p. 260. 



Specimens of Lafoea venusta were dredged by the " Challenger" " off 

 the Bermudas, 30 fathoms." 



Family HEBELLIDAE. 

 Genus Hebella. 



Hebella calcarata (A. Agassiz). 



Lafoea calcarata, A. Agassiz, 1865, p. 122. 

 Lafoea calcarata, Hargitt, 1901, p. 387, fig. 24. 

 Hebella calcarata. Nutting, 1901, p. 353, fig. 56. 

 Lafoea calcarata, Congdon, 1907, p. 467. 

 Hebella calcarata, Fraser, 1912, p. 371, fig. 34. 



