1883.] The Paleontologist. 59 



particles. The fragments or sections of branches are from one to two 

 lines in length, and from i-8th to i-ioth of a line in breadth, with about 

 6 of the oval elongated cell apertures to one line. Sides of the speci- 

 mens drawn together at the ends of apertures, giving them a chain-like 

 appearance, resembling, somewhat, a transverse section of a single row of 

 tubes of Halysites ; sometimes this feature is less pronounced than in 

 most cases, the sides then being nearly parallel, and not drawn in or 

 but slightly so. Occasionally the sections show swollen terminations. 

 They are, no doubt parts or joints (?) of a Polyzoary of considerable size, 

 as indicated by the profusion of fragments on both sides of the slab 

 about 4x4^ inches. 



Exceedingly fine longitudinal lines may be seen on the general 

 surface, with a good lens. 



This species differs from Hclopora tenuis, James, in the elongated 

 instead of circular cell apertures, the constrictions between the cells, and 

 the absence of a striated nonporiferous face as shown on one side of that 

 species; also in the larger size of the stems. 



The writer is indebted to I. H. Harris, Esq., of Waynesville, Ohio, 

 for the slab of fine specimens used for this description. Found near 

 that place, in the upper part of the Cincinnati Group. The name is 

 eiven in honor of the donor. 



TRACKS OF CRUSTACEAN (?) 



(Plate II., flg. 4.) 



The small slab of bluish brown shale, from which the drawing was 

 made, was found by the writer near Eden Park Reservoir, Cincinnati, 

 about 200 feet above low water mark of the Ohio river. After finding, 

 it was split in the middle in the line of stratification, and, consequently, 

 has not been weathered or abraded at all ; both matrix and cast are 

 clear and distinctly defined. The determination of the character of the 

 creature that made these tracks, will not at this time be attempted — 

 probably a Crustacean. 



Cincinnati Group. Lower Silurian formation. 



