BLACK-RIVER LIMESTONE. 51 
85. 4. STICTOPORA RAMOSA (n. sp.). 
Pu. XII. Figs. 6, 7& 7a. 
A branching, erect, somewhat stony coral, covered on both sides by a celluliferous crust ; 
branches flattened ; cells oval, in quincunx order, arranged in regular oblique lines, 
alternating with each other in the direction of the axis, opening obliquely upward and 
outward ; mouths of the cells in perfect specimens elevated, more perfectly rounded at the 
upper side ; intercellular spaces striated ? 
This fossil occurs in various conditions, generally more or less worn, and broken into 
fragments : when perfect, the mouths of the cells are clearly elevated ; when a little worn, 
they are even with the crust ; when more worn, the whole frond has a retepore-like aspect, 
and the intercellular spaces are proportionally much less. 
Fig. 6. A small fragment of limestone, the surface covered with pieces of the coral. 
Fig. 7. A small portion showing the base of the cells when separated from the internal axis. 
Fig. 7 a. The same magnified. 
Position and locality. Great numbers of fragments of this species occur in some thin shaly 
layers at the termination of the Birdseye limestone ; during the deposition of which, the 
species seems to have flourished in much greater numbers than at any other period.* 
(State Collection.) 
CRINOIDAL COLUMNS. 
Pu. XIl., Fig. 9. 
Fragments of columns of this kind, differing in no respect from the species of the Trenton 
limestone, are found in the Black-river limestone at Watertown (See plate and description 
of the same). 
* The accompanying illustration may render the character of this fossil more clear. 
Ais: 
Fig. 1 is a fragment of stone, showing the fossil of its natural size. 
Fig. 1 a. A magnified portion, showing the ranges of cells and their regular alternation. 
Fig. 2. A small fragment of the coral, showing the bases of some of the cells. 
Fig. 2*. The same enlarged. a, the external celluliferous crust. 0, the axis denuded of the crust, showing marks 
of the cells. c¢, bases of the cells, the margin well defined, distinctly oval; the longest diameter in the 
direction of the axis. 
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