TRENTON LIMESTONE. 



!r3 



111. 1. ESCHAROPORA RECTA. 



Pl. XXVI. Figs. 1 a, b, e, d, e,f, g. 



Coral straight, rigid, unbranched, cylindrical or slightly compressed. 



The essential characters are expressed in the remarks under the generic description. 



Fig. 1 a. Specimen natural size ; the lower extremity expanding to form the rootlike processes, and 



terminating abruptly above. 

 Fig. 1 J. An enlarged portion, showing the arrangement of cells, which are apparently in ascending 



spiral Unes around the axis. 

 Fig. i c. A small specimen, entirely cylindrical, tapering above to an acute point. 

 Fig. 1 d. An enlarged portion, showing the oblique elevated lines crossing the surface, in the spaces 



between which are the openings of the cellules. These lines are partially obliterated in 



worn specimens. 

 Fig. 1 e. The root or attaching part of this coral : the blanches embrace a portion of stony matter. 



Upon the base of the broken shaft of the coral, a portion of the surface is marked as the 



specimen 1 a. 

 Fig. 1 / Transverse section of the axis of this specimen. 

 Fig. 1 g. A longitudinal section of one of these corals, a little on one side of the centre, showing a few 



ranges of the apertures of the cells, and the diverging and ascending tubes on either side. 



Position and locality. In the Trenton limestone, both in its lower and central portions. 

 Middleville, Jacksonburgh, &c. Herkimer county. (State Collection.) 



112. 2. ESCHAROPORA RECTA, var. NODOSA. 



Pl. XXVI. Fig. 2. 



This coral consists of a fragment somewhat bent. The surface presents the same arrange- 

 ment of cellules as in the figs. 1, differing only in the nodulose elevations on the elevated 

 ridge along the centre of the shaft. 



Genus STIC TOP OR A. 



[ Greek, tfrixrog, spotted or punctured, and •ropa, pore.] 



Character. A foliaceous, somewhat calcareous, branching coral, attached below by a 

 smooth rootlike expansion ; stems and branches bifurcating, and sometimes coalescing, 

 celluliferous on both sides, with a thin central axis ; cellules consisting of oval tubes, not 

 urceolate or utricular ; apertures distinctly oval, with a raised border nearly as large as the 

 cell within. 



Remark. Although it is impossible to define precisely what was the orginal form of the 

 mouths of these cellules, yet, from finding large numbers of them unworn and apparently 

 [ Paleontology.] 10 



