140 PALEONTOLOGY OF NEW-YORK. 



Position and locality. In the lower crinoidal and coral-bearing part of the Niagara lime- 

 stone at Lockport. ' {State Collection.) 



528. 5, CLADOPORA MULTIPORA {n. sp.). 



Pl. XXXIX. Fig. lo-g. 



Frond ramose or reticulate ; branches short, terete, in the reticulations cylindrical ; cells 

 numerous, closely arranged, penetrating to the axis in a slightly oblique direction ; openings 

 upon the surface subangular or circular, sometimes apparently transverse ; reticulations irregular, 

 and the dichotomous branches often extending beyond and terminating in terete forms. Cells 

 48 to 60 in the space of an inch longitudinally. 



This species is readily distinguished, even in small fragments, by its numerous closely ar- 

 ranged cells, which have the general appearance of being circular, but which are often slightly 

 irregular or transversely oval. The openings, where perfect, are like others of the genus, and 

 appear like a series of loops or reticulations alternating with each other in a longitudinal direc- 

 tion, but often arranged in parallel series. The effects of wearing and weathering often produce 

 changes in the form of the openings and the appearance of the surface ; but the characters of 

 the species are so well marked that little difficulty can usually attend its identification. 



Fig. 1 a. A part of a broken and macerated specimen, showing its irregularly reticulated cha- 

 racter. 



Fig. 1 S. A fragment showing the terminations of several small branches. 



Fig. 1 c. A fragment enlarged, showing the forms of the mouths of the cells where little worn. 



Fig. 1 d. A similar portion enlarged, from a surface somewhat more worn than the preceding 

 specimen. 



Fig. 1 e. A fragment where the surface is much worn, presenting simple circular pores on a 

 smooth surface. 



Fig. 1/. A longitudinal section, showing the interior structure of the coral. 



Fig. 1 ^. A transverse section of a single stem, showing radiating tubular cells. 



Position and locality. In the lower part of the Niagara limestone at Lockport. 



(State Collection.) 



529. 6. CLADOPORA MACROPHORA («. sp.). 



PL. XXXIX. Fig. 2 a, b. 



Branches slender, lax, uniting in wide meshes of irregular form and size ; direction of cells 

 but slightly oblique to the axis ; pores (in a much worn specimen) somewhat longitudinally 

 oval, or approaching to circular ; character of the cells as in other species of the genus. 



In a small portion where the weathered openings of the cells are visible, they have much the 

 appearance of C. cervicornis ; but the branches are more slender than in that one, and have 

 the additional character of a reticulated form. Unfortunately no well preserved specimens of 

 this species have been obtained, but it differs so entirely in character from either the pre- 

 ceding or following reticulate species, that it will be readily distinguished. 



