210 Dr. W. C. M'Intosli on the Zoophytes of St. Andrews. 



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 Campanulina turrita of Prof. Wyville Thomson ; 

 only the hydrothecge are much shorter in proportion to the 

 length of the teeth. Some examples on a laminarian stalk 

 had very long stems. The hydrothecse in all very closely 

 resembled those on Dr. Allman's Campanulina repens (Hincks, 

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

 were observed. 



Fam. 4. Lafoeidae. 



Genus Lafoea, Lamouroux. 

 Lafoea dwmosa^ 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 hydrothecge ; but they are not quite so long as 

 those described under L. fruticosa^ Sars, and the intermediate 

 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 Avater, especially Ser- 

 tidaria filicula. The pedicels of the hydrothecaj 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 Crisia ehurnea, and a^stalked species 

 on Scrupocellaria scruposa. 



Genus Calycella, 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. 



Genus CuSPiDELLA, Hincks. 

 Cuspidella humilis^ Hincks, Brit. H. Z. vol. i. p. 209. 



Not uncommon on the tests of Ascidia sordida, and on the 

 valves of Psammobia and other shells, from deep water. The 

 tests of Ascidians are the seat of a reticulated growtli witli 

 numerous minute club-shaped processes risingfrora the creeping 

 stem wliich is associated with C. Immilis. 



