82 
BULLETIN OF THE LABORATORIES 
cells arise near the nonporiferous side, are quite elongated, and reach 
the surface at a very oblique angle. Longitudinal arrangement of cells 
is incidental rather than typical and often obscured, whereas the oblique 
series remain distinct. 
Flint Ridge, rare.*^ iyLaxwn^ loose meshes.) 
Genus POLYPORA, McCoy. 
Zoarium flabellate or infundibuliform, poriferous on the inside; 
branches nearly straight, connected at regular intervals by non-porifer- 
ous dissepiments. No median keel on the poriferous side of the 
branches; from two to six rows of cells. 
IX. PoLYPORA FASTUOSA, De Konincli. 
{Plate VII, Fig. 9, a, b, c, d.) 
Zoarium infundibuliform. Branches dividing dichotomously, rap- 
idly near the centre, then less frequently, becoming straight above. 
Non-poriferous face with sloping sides, thus leaving a sort of carina 
along the middle, varying from this to ordinary convexity ; the edges 
of branches acute, frequently more horizontal than the sides of the 
branches, thus forming a narrow margin along the fenestrules. The 
dissepiments very prominent, as high as the branches or even exceed- 
ing the same, less than a third the width of the branches, narrowly 
compressed, and consequently carinated. These dissepiments are very 
characteristic, giving the oval inclosed fenestrules an oblong outline. 
Branches finely and closely striated longitudinally; dissepiments also 
striated. Poriferous face convex. Cells arranged in four to six rows, 
usually four or five rows; the diagonal series however are usually first 
noticed. Cell apertures small, separated by twice their length longi- 
tudinally. The spaces between the cells are longitudinally striated by 
wavy lines. In another specimen, with the same characteristics on the 
non-poriferous side, the poriferous face presents larger cells arranged 
closely together without the intervening striations. The dissepiments 
longitudinally striated. 
The main characters in the identification of this species have been 
drawn from Dr. Franz Toula, in his descriptions of Permo-carboniferous 
fossils f 7 'om the west coast of Spitzbe 7 gen^ 1875, of Iho Carboniferous 
Limestone Fauna from the Bai'ents Islands., N. W. of Nowaja-Semlja, 
