ZOOPHYTES. 25 



(a) hydrotliecffi on simple stalks of variable length, viz. from 

 three to nine rings ; and (b) branched stems of some height, 

 with the alternate stalks of the hydrothecse composed of from 

 six to more than a dozen rings. Moreover, in these branched 

 forms it is not uncommon to see more than one pedicel arise 

 at the same fork, so as to cause the observer to fancy he is 

 viewing the Camjianulina turrita of Prof. Wyville Thomson ; 

 only the hydi-othecK are much shorter in proportion to the 

 length of the teeth. Some examples on a laminarian stalk 

 had veiy long stems. The hydrothec» in all very closely 

 resembled those on Dr. Allman's CampanuUnarepens (Hincks, 

 Brit. H. Z. vol. i. p. 189, pi. xxxviii. fig. 1). No gonothecaj 

 were observed. 



Fam. 4. Lafoeidse. 

 Genus Lafoea, Lamouroux. 

 Lafo'ea dumosa, Fleming ; Hincks, Brit. H. Z. vol. i. p. 200. 

 Common on various zoophytes from deep water. Some 

 varieties of this species have short stalks of one or two whorls 

 supporting the hydrotheca; ; but they are not quite so long as 

 those described under L. fruticosa, Sars, and the intennediate 

 forms show that they are to be referred to the present species. 



Lafoea fruticosa, Sars ; Hincks, Brit. H. Z. vol. i. p. 203. 

 Occasionally on zoophytes from deep water, especially Ser- 

 tularia filicula. The pedicels of the hydrothecse have from 

 three to five rings. 



Besides the above there are several microscopic forms closely 

 allied, which creep along the stems of various zoophytes. A 

 sessile form is common on Crista eburnea, and a stalked species 

 on Scrupocellaria scruposa. 



Genus Caltcella, Hincks. 

 Calycella syringa, L. ; Hincks, Brit. H. Z. vol. i. p. 206. 

 Abundant on the stems of Hydrallmania falcata and other 

 zoophytes from deep water. 



