30 



The specimens dredged were rather poor (the finest not exceed- 

 ing an inch in height), but showed the characteristic compound 

 stem formed by a number of tubules bound closely together, and 

 gradually becoming simpler and more slender towards the extremity 

 of the shoot as the branches are given off (see fig. 1). 



The branches themselves again branch freely, forming a bushy 

 shoot with a delicate and graceful appearance. 



The stem is annulated (4-8 rings) above the origin of the calycles 

 and branches ; calycles alternate, campanulate, with entire margins, 

 and borne on erect pedicels (with 5-12 rings) ; gonothecae axillary, 

 urn-shaped, with a raised aperture, and borne on a short four-ringed 

 stalk, and altogether much resembling the gonotheca of 0. geniculaia 

 (fig. 26). 



Gonozooids only observed inside the gonotheca ; apparently 

 with 24 tentacles, and similar to those of 0. geniculala. 



GONOTHYREA ? HYALINA, Hincks. 



G. ? hyalina. ' ' Referred provisionally to this genus . ' ' Hincks, 

 Brit. Hyclr. Zooph., pi. xxxv., fig. 2, and " On New Brit. Hydroida," 

 Ann. Nat. Hist., xviii. (3rd ser.), 297. 



Localities.— Station VIII., Station III., Station I., 8 miles 

 E. J S. of Cullercoats. On shells, zoophytes and Ascidian tests 

 (15 fathoms). 



Geographical Distribution. — " Profusely investing Tubu- 

 laria, Halecium, &c, from Shetland, and, I believe, from deep water." 

 (Hincks' Brit. Hy. Zooph.) 



Although occurring frequently, none of the specimens showed 

 the " densely clustered, tall and much branched " aspect described 

 by Hincks. 



A large species, with stem annulated (5-8 rings) above the 

 origin of the branches or pedicels. Pedicels with 5-15 rings, sup- 

 porting a handsome long slender calycle with castellated denticles 

 (about ten in number), the denticles themselves showing distinct 

 indentations. Gonotheca not observed. 



