HYDROIDS OF BEAUFORT, NORTH CAROLINA. 



359 



Gonosome. — Gonophores growing either from the stem or the hydrorhiza attached by short annu- 

 lated pedicels; gonangia strongly corrugated, each corrugation with a distinct keel; oval, truncate at 

 the distal end. 



Distribution. — On floating sargassum from the seaward side of Bogue Bank. 



I can see no good reason for separating Clytia bicophora Agassiz from Clytia johnsloni (Alder). They 

 seem to agree in every particular. 



Clytia longicyatha (Allman). 



Obelia longicyatha Allman, Mem. Mus. Comp. Zool., Harvard, 



1877, p. 10. 

 Clylia longicyatha Pictet. Revue Suisse de Zoologie, 1893. p. 28. 



Trophosome. — "Hydrocaulus attaining the height of 

 nearly an inch, fascicled below, alternately branched; 

 main stem annulated for a short distance above each 

 ramulus; ramuli annulated at their origin; hydrothecal 

 peduncles of moderate length, more or less annulated. 



Fig. 17. — Clytia johnstonii^AWAei). A, hydrothecaand 

 gonangium growing from the stolon; B, gouangium 

 growing from the pedicel. 



Hydrothecal narrow, deep, nearly cylindrical above and 

 then tapering toward the base ; the orifice cut into about 

 20 acute, deep, narrow teeth." (Allman.) 



Gonosome. — Gonangia with smooth walls, borne on 

 the hydrorhiza or the stem, inclosing the deep bell- 

 shaped medusa buds, arranged on the blastostyle in 

 pairs, the one opposite the other. Length of gonangium 

 I to I.I mm., diameter 0.4 mm. (From Pictet.) 



Distribution. — On floating sargassum off Bogue Bank; 

 on sponge dredged by Fish Hawk. 



Allman described this species from Florida without 

 finding the gonosome and judged it to be Obelia. Later 

 Pictet found what he considered to be the same species 

 from the Bay of Amboine, with the gonosome present. 

 This showed it to be a Clytia instead of an Obelia. There 

 seems little doubt that this is Allman 's species, although 

 the depth of the hydrotheca is not so great as in All- 

 'nan's specimens or in those I have obtained. I ob- 

 tained only a fragment of a colony with two perfect hy- 

 drothecae and another with but one. Consequently, I 

 have copied Allman 's description of the trophosome 

 and have translated Pictet's description of the gonosome. The figtu'e of the gonosome is from Pictet. 



Clytia noliformis (McCrady). 



Campanularia noliforniii McCrady, Proc. Elliott Soc., 1857, p. 92. 

 Clytia noliformis Nutting. Hydroids of Woods Hole, 1901, p. 343. 



Trophosome. — Stem unbranched; pedicels short, stout, extensively annulated, sometimes through- 

 out the whole length; hj'drothecse broadly campanulate, sometimes broader than deep but usually with 

 length and breadth about equal; teeth 10 to 12, rounded at the tip. 



Fig. 18. — Clytia longicyatha (Allman). A, two hydro- 

 thecae; B, portion of colony to show gonosomes. (After 

 Pictet.) 



