Cyclostomatous Bryozoa from Madeira. 63 
Between the radiating series of cells are one or two rows of 
ores. 
: A few examples of this small species were found upon a 
halichondrine sponge (Petrosta) which came from deep water 
off Madeira. The largest had a diameter of no more than 
3millim. Its place seems to be near Lichenopora (Disco- 
porella) Jfimbriata, Bk. (Cat. Cyclost. Pol. B. M. p. 32, 
pl. xxvii.). 
Radiopora irregularis, J. Y. Johnson. 
White or brown, seated on a thin caleareous lamina. The 
zoarium usually consists of a central portion, around which 
extend subtriangular lobes, irregular as to their directions and 
relative sizes, but frequently giving to the whole something 
of the appearance of a starfish, such as Asterina, with short 
broad rays. 
The central portion of the zoarium is raised and cupped, 
and the cireumambient ridge is crossed by radiating series of 
upright connate cells. A depression runs along the middle of 
each exterior lobe, but stops short of the margin of the 
zoarium. Numerous series of cells are arranged at right 
angles to the median depression, and at the distal end of the 
lobe the series of cells radiate from the end of the furrow 
towards the margin. 
The cells are ‘upright, connate, and invariably form a single 
series. ‘They are highest near the central cup and the depres- 
sions of the lobes; they gradually fall in height until they 
become immersed, and their mouths alone are shown at the 
margin of the goarium. The mouth of the upright cells is 
prolonged into a mucro on the distal side, and sometimes on 
the opposite side also when the upper part of the cell is 
distinct. Round or oval pores varying in size occupy the 
central area and the lateral furrows. Between the series of 
cells there are two or three rows of pores. 
There is much irregularity both as regards the outline and 
the superficies of this species: for instance, there are some- 
times more intramarginal cups than one; at others there is 
no central cup at all; in some cases the central cup contains 
a short detached series of erect cells; a series of cells occa- 
sionally throws off a branch series or more than one. 
The largest specimen I have seen has a diameter of 
10 millim. ‘This species has been found on seaweed and on 
Pinna shells, but the best examples were attached to the 
outside of a wine-bottle dredged in Funchal Bay. 
From the above description it seems that Mr. Busk’s 
definition of the genus (Cat. Cyclost. Polyzoa Brit. Mus. 
