44 NATURAL HISTORY BULLETIN 



Clytia EDWARD8I (Xidting). 



In his Woods Hole hydroid paper. Nutting described this species,<5 but 

 as he did not find the gonosome, he put it in the genus Campanularia. In 

 material obtained at Departure Bay, Vancouver Island, I found what I 

 took to be the same species with the gonosome present. This I figured and 

 described last year." The finding of the gonosome made it necessary to 

 change the species from the genus Campanularia, where it was placed 

 provisionally, to the genus Clytia. Last summer I was fortunate enough 

 to obtain specimens of this species, at Fay's wharf and off Penzance, that 

 had gonophores jierfectly agreeing with the gonopliores of the Departure 

 Bay specimens. This corroborates very satisfactorily the diagnosis of the 

 Departure Bay specimens. 



Clvtia minuta (Xidting). 



As Campamiiaria minuta, the trophosome of this species was described 

 by Nutting.s He did not find the gonosome. Many specimens were ob- 

 tained last summer, growing on Eudendrium stems on the piles of the 

 bridge at the entrance to Lagoon Pond, A'ineyard Haven, and on Tubularia 

 at Fay's Wharf, Woods Hole. The finding of the gonosome of the species 

 necessitates the placing of the species in the genus Clytia. 



The species has a very characteristic mode of growth. The stems and 

 pedicels are usually very long and slender and as the branches and pedicels 

 leave the stem they turn abruptly upwards side by side with the main stem. 

 Consecjuently, though the colony may reach a height of 2 cm. or more, 

 the spread is insignificant, yet so many colonies grow close together that 

 at first glance one would not observe the extreme slenderness of the colony. 

 Annulation is carried to the extreme in many colonies as there is scarcely 

 any part of the stem, branch or pedicel that is not annulated or at least 

 wavy in outline. In other colonies this is not so marked but even here there 

 are few stretches of any length that are entirely uniform. The hydrotheca 

 reminds one somewhat of that of Clytia jolinstoni Alder, or more especially 

 of such specimens as Agassiz has figured as Clytia hicopliora,^ and in some 

 stages of the growth of the colony it resembles the colony of that species. 

 The hydrotheca, however, is smaller in C. minuta and there are usually but 

 eight teeth present, while C. jolinstoni has as many as twelve. 



The gonangium bears a strong resemblance to the gonangium of C. john- 

 stoni. It grows either from stolon or from the main stem. It is oval or 

 obvate in shape and has corrugations similar to that of C. jolinstoni. 



«Hydroids of the Woods Hole region, 1901, p. 346, fig. 28. 



' Hydroids of the West Coast of North America, 1911, p. 34, pi. Ill, figs. 1, 2. 



sHydroids of the Woods Hole Region, 1901, p. 345, fig. 27. 



" Contributions to the Natural History of U. S., vol. lY, pi. XXIX, fig. 6. 



