190 YINCULARID. 
FAMILY—MEMBRANIPORID&. 
Zoarium membrano-calcareous, or calcareous, expanded, encrusting, 
sometimes foliaceous, contorted and sub-erect. Cells horizontal, quin- 
cuncial or serial. 
Genus, MEMBRANIPORA—Blanville. 
Cells more or less irregularly disposed, or quincuncial, with raised 
margins, a greater or less extent of the front membranaceous and 
flexible. 
M. membranacea, Zinneus, Busk, lc, p. 56. Cells oblong, 
with a short blunt spine at each upper angle. 
Lyall Bay, on Fucz, etc. Europe. Australia. 
M. pilosa, Lznneus; Gray, Dieff. N.Z., u., p. 292; Johnston, 
Brit. Zooph., p. 280. Cells prolonged below; a moveable spine or 
vibraculum below the lower margin of the aperture, sometimes aborted ; 
an irregular number of marginal spines ; wall of cell cribriform. 
Lyall Bay. Europe. Australia. 
M. lineata, Zinneus; Busk, lc, p. 583; Johnston, lc, p. 3409. 
Cells oval, separate, the margin armed with numerous slender spines, 
erect or bent inward. 
Europe. Greenland. 
M. tessellata, Hutton, C.A.M., ~. 96. Cells oval, arrangement 
quincunc, front rounded above with the sides and bottom flat ; margin 
rough with short projecting denticulations; interspaces granular ; 
ovicells rather flat, granular. 
Common, incrusting dead shells, etc. 
M. brunnea, Hutton, CALA, p. 96. Cells broadly oval, with a 
single spine at the centre of each side projecting over the front ; ovicells 
flattened with a median ridge ; a cup-shaped avicularium on each side 
just below it ; brown. 
On Zurritella rosea. 
M. cyclops, Busk, Zc, p. 61. Front of cells oval ; margin very 
much raised, beaded ; a single avicularium below the aperture. 
M. magnilabris, 2wsk, 7c, ~. 62, Front of cells oval ; upper 
margin semicircular, much raised; moveable lip very large, occupying 
the entire semicircular upper third of the front of the cell, remainder of 
the front of cell depressed, membranous or semi-calcareous, punctured 
South Africa. Atlantic. 
Genus, LEPRALIA—Johnston. 
Zoarium adnate, crustaceous, spreading from a centre in a more or | 
less circular form; composed of contiguous or connected, calcareous, 
decumbent cells, the walls of which are complete in front. 
