HYDROIDA II 



31 



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

 Catnpanulina they are invariably sympodial. 



Campanulina turrita Hincks. 

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

 Upright sympodial colonies with nionosiphonic hydrocanlus, ringed throughout. The stem 

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





zoo m. -y 600 m. ._ «,_iooom. — 2ooom. 



Fig. IX. Finds of Lafocina 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 hydrothecje is replaced by a branch, so that the colonies 

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

 twice as long as broad; they are practically cylindrical, with evenh- 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 gonothecEe are set upon short, ringed stalks, projecting from the stem or branches beside 

 the hydrotheca stalks. The gonotheca; 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. 



