HYDROIDA II 



3 1 



Thus the two last-named genera have, as far as we know, always stolouial colonies, whereas in 

 Campanulina they are invariably sympodial. 



Campanulina turrita Hincks. 

 1868 Campanulina turrita. Hincks, A History of the British Hydroid Zoophytes, p. 190, pi. 36, fig. 2. 

 Upright sympodial colonies with monosiphonic hydrocaulns, ringed throughout. The stem 

 slightly zigzag. Stem and branches are divided into slightly pronounced internodia, bearing distally 



Zooo m. 



Fig. IX. Finds of Lafoeina maxima in the Northern Atlantic. 



an apophysis and one or two short-stalked hydrothecse; from the apophysis the next internodium 

 projects. At irregular intervals, one of the hydrothecse is replaced by a branch, so that the colonies 

 assume an irregularly bushy appearance. The hydrothecas are fairly large, and when closed, about 

 twice as long as broad; they are practically cylindrical, with evenly curved proximal part. Diaphragm 

 lacking. Closing apparatus passes over without distinct limitation into the lower portion of the hydro- 

 theca wall; it closes conically over the indrawn polyp. 



The gonothecse are set upon short, ringed stalks, projecting from the stem or branches beside 

 the hydrotheca stalks. The gonothecse are small, slender, reversed conical or cylindrical with gradu- 

 ally tapering basal part; they are cut off transversely at the distal end. The gonophores develope 

 (according to Hincks) into free medusse. 



