ee | eae a age ee ee 
_ Paleozoic Corals and Foraminifera. 129 
tions from thin short slender stems, this is one of the prettiest 
species of the genus. It most resembles the C. tenuicollis (M‘Coy) 
figured in the ‘Annals’ for October 1847 (Pl. XI. fig. 8), from 
the carboniferous shales of New South Wales, but is distinguished 
by its smaller size and much shorter necks to the cells, while, as 
in that species, their small diameter compared with their cups 
distinguishes it from the C. crassa (M‘Coy) of the carboniferous 
slate of Ireland. 
Rare in the carboniferous limestone of Derbyshire. 
(Col. University of Cambridge.) 
(Madreporacea.) 
Dendropora megastoma (M‘Coy). 
Sp. Char. Stem slightly flexuous, subquadrate, branches few, 
distant, resembling the main stem in size and shape, and 
coming off from it nearly at right angles; each face has a row 
of large oval cells with prominent edges, the sides of which 
have twelve vertical sulci ending in tubercles ; the cells of each 
row are rather less than twice their diameter apart, the lateral 
rows opposite and alternating with the other two rows; the 
width of the cells slightly exceeds that of the face on which they 
rest, so as to indent the margin ; interstices obscurely poroso- 
punctate ; width of stem about half a line. 
This beautiful coral is distinguished from the D. explicita 
\Mich.) from the Devonian beds of Boulogne-sur-Mer by its 
smaller size and larger cells. Michelin, in his ‘ Iconographie 
Zoophytologique,’ founds this genus from the last-named coral, 
and approximates it to the genera Criserpia and Aulopora; the 
twelve sulci which I observe to the margin of the cells in this 
species however show that this cannot be the true affinity of the 
group, which must now rather be placed in the Madreporacea 
near Seriatopora. 
I have examined several specimens on a piece of carboniferous 
limestone from Derbyshire. 
(Col. University of Cambridge.) 
Paleopora (M‘Coy), n. g. 
Gen. Char. Corallum polymorphous, generally subhemispherical 
and concentrically ridged beneath, rarely branched ; formed of 
cylindrical, distinctly walled, tubular cells, having internally 
twelve vertical sulci or rudimentary lamelle, and divided at 
irregular intervals by transverse diaphragms ; the tubes sur- 
rounded and connected by a uniform minute network of small 
vesicular plates. 
I propose this genus for all the so-called Porites of the palzo- 
zoic rocks. First described by Goldfuss as Astrea, they were re- 
Ann. & Mag. N. Hist. Ser. 2. Vol. iii. 
