306 Eepoet of the State Geologist.- ^ 



Cladopora, Hall, 1852. 



Cladopoba Clabkei, sp. nov. 

 Plate V, figure 1. 



Corallum compact, ramoge. Branching, bifurcate infrequent. 

 Cells in five longitudinal rows, comparatively large, distinctly- 

 labiate. Diameter of the branches varies from .2 to 4 mm. 



The branches of this species are unusually small, and the bi- 

 furcations infrequent. One specimen measures 46 mm. from 

 a broken end to the point of branching ; another measures 42 

 mm. The apertures also are comparatively distant and are 

 regularly arranged in five longitudinal rows. The corallites are 

 long, nearly parallel to the axis of the branch, with a slight out- 

 ward curvature as they approach the periphery. The plane of 

 the orifice is nearly perpendicular to the cell wall. This, taken 

 in connection with the acute angle at which the corallites meet 

 the surface, gives the cell mouths a somewhat labiate appearance. 

 Above each orifice the branch is slightly flattened or convex, 

 causing it to have a subangular or nodose form. The surface of 

 the branches is without ornamentation, very smooth and dense. 

 A cross section of the branches shows that the cells have been 

 distorted by mutual pressure. They are not, however, polygonal 

 as in Favosites, but have become more or less cresent shaped. 

 'No tabulae have been observed. The mural pores are small and 

 very distant. 



Horizon. — Shaly limestone. 



Locality. — The Indian Ladder, Albany county, IS". Y. 



Cladopoba Halli, sp. nov. 

 Plate V, figure 2. 



Corallum dense, branching. Kamification bifurcate. Branches 

 usually flattened, of larger size than in G. Clarlcei., varying from 

 7x5 to 5x3 mm. in diameter. Cells smaller, more closely set, 

 not labiate and not serially arranged. 



This species can be readily distinguished from C. ClarJcei by 

 the large size of the branches and by the small cells, thickly and 



