530 ZOOPHYTA. TUBIPORADiE. Disgopora. 
larged globular heads, radiated with plates of united vertical 
cells. 
In deep water, Zetland. 
About an inch in height, the branches scarcely exceeding one-eighth ; the 
branches are short, pierced by numerous pores, the openings of cells con- 
verging towards the centre ; the head is stellate, the rays are highest in the 
middle of their course, diminishing towards the centre and lower margin of 
the head ; each ray is compressed, and consists of two rows of tubular cells, 
united, crowded, with subangular orifices ; the tubes have a central direc- 
tion, and give to the sides of the plates a striated appearance. This species 
has probably been referred to as an inhabitant of the north seas, under the 
title of Millepora truncata, but it differs widely from ths Myriozoos of Donati, 
to which the term was restricted by Pallas. 
Gen.XLVIII. DISCOPORA.— a subcircular crust, adhering 
in the middle, circumscribed, and raised at the margin, 
forming a cup, bearing on the inside a disc of tubular cells. 
121. D. verrucaria.- — Margin thin, concentrically wrinkled, 
disc with the centre nearly smooth, tlie tubular cells diverging 
and submarginaL 
Madrepora verrucaria, Linn. Syst. i. 1272. Pallas^ EL 280.~Millepora 
verr. Sol. Ellis Zoopli. 137.--On fuci and corallines, common. 
About a quarter of an inch in diameter ; the centre is generally punc- 
tured with the traces of the obliterated rays, the tubes are sometimes slight- 
ly cohering, and disposed in rays ; the orifices are round and simple. 
122. D. Mspida. — -Margin thin and waved, the cells distri 
buted or radiated, with denticulated orifices. 
Coral resembling the cups and foliage of flowers, Cordmer's Ruins, 
No, xxii — On corallines from deep water, Zetland. 
Breadth nearly an inch ; hispid, the cells seem distributed over the whole sur- 
face, and more vertical than the preceding ; there are, however, waved porous 
grooves, and the ceils seem disposed on each side of these in irregular trans- 
verse rows, united or free, short, with expanding orifices, dividing into irre- 
gular spinous processes. This species is very common in Zetland, adhering 
to Cellepora cervicornis^ and the figure of Cordiner is a tolerably accurate re- 
presentation. He does not, however, state his examples as Scottish. 
Gen. XLIX. FILIPOIIA. — Massive, consisting of numerous 
long, cylindrical, linear tubes, slightly branched, variously 
united and twisted. 
123. Y . jilograna. — Tubes about ^^^Qth of an inch in diame- 
ter, fasciculating and twisting, forming large irregular meshes. 
Serpula filograna, Linn. Syst. i. 1265 -S. corallifica, Pallas., El. 239 — 
Common on old shells and the roots of fuci a little beyond low water- 
mark. 
The masses sometimes occur upwards of a foot in diameter ; the tubes are 
slightly wrinkled transversely, and nearly of equal size throughout, except 
where divided ; the colour is white. 
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