358 



BULLETIN OF THE BUREAU OF FISHERIES. 



Gonosome — Gonophores appear both on the stolon and on the stem borne on short annulated 

 pedicels. The gonangia are oblong-oval in shape with the opening occupying the greater part of the 

 upper surface. 



Distribution. — On seaweed floating in Beaufort Harbor. 



The gonosome has not been described hitherto. JIany gonangia were present on this material but 

 almost all were empty. Some of them had two or three medusae but they were not in a good state of pres- 

 ervation. They were certainly not 

 Obelia medusae and probably not 

 Thaumantias. They had the shape 

 of Clylia medusae and I have little 

 doubt that they belong to that genus. 



Clytia cylindrica Agassiz. 



Clytia cylindrica Agassiz, Cont. Nat. 

 Hist. U. S.. IV, 1862, p. 306. Hargitt, Ameri- 

 can Naturalist, 1901, p. 3S1. Nutting, Hy- 

 droids of Woods Hole, 1901, p. 342. 



Trophosome. — Stem imbranched 

 with slender pedicel, annulated prox- 

 imally and distally; hydrothecae 

 cylindrical, more than twice as deep 

 as wide, suddenly constricted at 

 the base at the point where the 

 diaphragm appears inside, the part 



Fig. 16. — C/j'/iacj'/iwtfn'ca Agassiz. 

 A, hydrotheca and gonangium 

 growing from the stolon; B, 

 gonangium growing from the 

 pedicel. 



Fig. 15. — Clytia coronata (Clarke). A, branched colony; B. unbranched 

 colonies. 



below the diaphragm being little larger than the end of the pedicel; teeth 

 10 to 12, sharp-pointed and deeply cut. 



Gonosome. — Gonophores arising either from the hydrorhiza or from 

 the pedicel by means of short pedicels with one or two annulations; 

 gonangium smooth, oblong, slightly narrowed just below tlie rim. 



Distribution. — Very common, growing on Pcnnaria, Eitdendrium, 

 alcyonarians and many other forms, on the piles of the railroad bridge, on 

 floating sargassum, on the piles at Marshallberg; dredged in 6 to 12 feet of water in Bogue Sound, North 

 River, and the Straits. 

 Clytia johnstoni Alder. 



Campanulariajohnsloni Alder, Ann, and Mag., 2nd ser., xvm. 1856, p. 359. 



Clytia juhnslmii Hincks, Br. Hydroid Zoophytes, 1868, p. 143. 



Clytia bicophora Agassiz. Cont. Nat. Hist. U. S., iv. 1862. p. 304. Hargitt, American Naturalist, 1901, p. 381. Nutting, 

 Hydroids of Woods Hole, 1901, p. 343. 



Trophosome.— Stem unbranched or sometimes with a single branch; pedicels long and slender, 

 annulated proximally and distally; hydrothecae broadly campanulate, not much deeper than wide, 

 with 12 to 14 sharply pointed, rather shallow but distinctly cut teeth. 



