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Paleozoic Corals and Foraminifera. 125 
about thirty curved radii: vertical section, tubes irregularly 
transversely septate by vesicular plates ; spaces between the 
tubes composed of slightly waved transverse rows of small, 
curved, vesicular plates, forming a nearly uniform, minutely 
cellular structure: horizontal section, tubes either plain or 
showing more or less of the transverse vesicular plates ; inter- 
vening spaces irregularly cellular, but showing a slight dis- 
position to form curved, star-like lines round the tubes. 
This interesting coral bears a strong external resemblance to 
the Nemaphyllum decipiens (M‘Coy), but is distinguished by 
having no divisional lines between the stars in either section. 
Rare in the carboniferous limestone of Derbyshire. 
(Col. University of Cambridge.) 
Sarcinula Phillips (M‘Coy). 
Ref. ? Phil. Pal. Foss. fig. 15 D. 
I have given the above name provisionally to a coral which I 
believe to be identical with the Flintshire one figured as above 
by Prof. Phillips, but not named or described. It is closely allied 
to the preceding species, but is of a thicker growth, the tubes are 
one-third larger and surrounded by thirty-two to forty strong 
radiating lamelle extending to the adjoining tubes, and there is 
an obvious tendency in the middle of the transverse diaphragms 
to extend upwards to form an irregularly compressed solid axis, 
often visible in the weathered cups. 
Common in the carboniferous limestone of Corwen. 
(Col. University of Cambridge.) 
Astrea carbonaria (M‘Coy). 
Sp. Char. Corallum forming very large masses, terminal stars 
from 9 lines to an inch and a half in diameter, obscurel 
pentagonal, bounded by narrow, rounded, cellular spaces 
(no simple divisional walls), having from 107 to 130 thin, 
jagged, radiating lamelle, which descend to form an oval or 
circular cup, and one half of which rise again to form a large 
oval central boss, in the centre of which the lamellae become 
indistinctly blended: vertical section shows the uninterrupted 
passage of the loose vesicular tissue, in gentle curves, from star 
to star; a very small space directly under the centre of each 
star having the vesicular structure almost transverse: hori- 
zontal section shows the alternately long and short radiating 
lamelle connected throughout by fine transverse vesicular 
plates, and the former obscurely blended at the centre (no 
. axis), and the irregular cellular structure intervening between 
the adjacent stars. 
