ZOOPHYTOLOGY. 261 
have been detected in their natural habitat. The Huzleya 
grew in a tank of my own filled, of course, with water from 
the Bay, which had not been changed for many months. The 
other beautiful Polyzoan was found by my friend Mrs. Brett, 
in a tank devoted to Actinie, but of which the water was 
changed pretty frequently. 
I had long observed the presence of the Huxleya in my 
tank, but fully believing it to be Eucratea chelata, had never 
taken the trouble to examine it, and, unfortunately, when I 
did so, the polypides were dead, and nearly decomposed. 
They appear to communicate very freely with the general 
sarcode of the polyzoary, as much so as in Laomedea and 
other hydroid Polypes. The retractor muscles are very long. 
The nearest form to Huxleya would probably be Halophila, 
Gray (‘B. M. Cat.,’ p. 43, pl. xxx). 
In the case of Bretiia, its discoverer laid it aside after 
gathering it, and it was not examined till after death; but 
there is no reason to suppose that there is anything dis- 
tinctive about the polypide. 
On some MAavEIRAN Potyzoa. 
Collected by J. Yates Jonnson, Esq. 
(Continued from No. XXII, p. 129.) 
We here give figures and descriptions of some species of 
Madeiran Polyzoa, additional to those contained in a former 
part of the Journal. 
]. Fam. BriceLtiartap#, Busk. 
1. Gen. Bugula, Oken. 
1. B. ditrupe, n. sp., Busk. Pl. XX, figs. 7, S. 
Cells biserial, elongate, fusiform. Aperture wide, elongated, with two 
or three marginal spines on the outer and one on the inner side of the 
aperture above. Avicularia capitate, attached to the side of the cell below 
the middle. 
Hab. Madeira, Johnson. On the shell of Ditrupa acuminata. 
The present species is distinguished from B. flabellata by 
the biserial arrangement of the cells, and from B. dentata 
by their elongated and fusiform shape. Independently, how- 
ever, of these characters, the general habit and very peculiar 
site of growth of B. ditrupe, formeriy noticed, would alone 
suffice to indicate its specific independence. 
