48 
PALEONTOLOGY OF NEW-YORK. 
428. 3. PHiENOPORA ENSIFORMIS (n. sp.). 
Pl. XVIII. Pig. 8 a, b, c. 
Stipe ensiform, narrowing and curved towards the base; surface at the larger extremity 
marked by eight or nine rows of rhomboidal reticulations, within which the oval openings of 
the cellules are scarcely discernable : three of the central rows are continued to the smaller 
extremity of the stipe. 
This species is quite abundant, and, when nearly perfect, is readily distinguished by its form. 
The openings of the cellule vary little in size from those of the first species described, though 
they are always rather more conspicuous, and appear more nearly rectangular. The longi¬ 
tudinal and transverse decussating lines are very prominent. 
This species is rarely found more than an inch in length, though great numbers often appear 
upon the same specimen of stone. When the curved portion is broken off, the slightly larger 
openings, the sharper edges of the decussating lamellse, and the narrow form, will suffice to 
distinguish it from P. explanata. 
Fig. 8 a. A single individual of the natural size. 
Fig. 8 b. A portion of the same enlarged. 
Fig. 8 c. A fragment of stone having several specimens upon the surface. 
Position and locality. In the thin layers of siliceous limestone in the lower part of this 
group, at Flamborough head, Canada West. 
Genus RHINOPORA (nov. gen.). 
[Gr. pivyj, lima, and rfopog, porus .] 
Corallum consisting of an expanded calcareous crust, either subcylindrical and hollow or 
explanate, poriferous on the two sides ; cells arranged somewhat in quincunx order, roundish 
or oval, and strongly raised in little papillae or pustules above the surface. 
429. 1. RHINOPORA VERRUCOSA {n. sp.). 
Pl. XIX. Fig. 1 a, b, c. 
A somewhat thin expanded calcareous crust of irregular form ; surface covered with roundish 
elevated cells, a little more than their own diameter distant from each other ; openings round 
or round-oval, directed upwards ; surface between the cells granular. 
Cellules 64 in the length of an inch. 
This species is very abundant, occurring in fragments of greater or less magnitude. It is 
clearly celluliferous on both sides, the callicles rising so much above the surface as to make it 
rough like a grater. All the specimens seen are fragments, the original having probably been 
