3 r^M 



THE 



PALEONTOLOGIST. 



No. 2. vt CINCINNATI,— U. P. JAMES. [September 14, 1878. 



The Price of this Number is 25 Cents. 



DESCRIPTIONS OF NEWLY DISCOVERED SPECIES OF FOSSILS 



AND REMARKS ON OTHERS, FROM THE LOWER AND 



UPPER SILURIAN ROCKS OF OHIO, BY U. P. JAMES. 



(lENUS BUTHOTREPHIS, (Hall.) 



B. flloiformis. (sp. nov.) (James.) Fossil consisting of a narrow stem, slightly 

 curved, with lateral branches less than a line in width, from I to 2 lines apart, and about 

 2 lines in length from the body of the stem. The branches stand at an angle, upward, 

 with the stem of about 45 degrees. The specimen bears some resemblance to the pinna 

 of a fern, with closely set lateral pinnules; it is 7 inches long and about ^ of an inch 

 broad, measuring across from point to point of the branches. It is partly imbedded in a 

 slab of shaly limestone. 



Found by Mr. J. G. Shepard, near Lebanon, O., middle beds of Cincinnati Group. 



GENUS SPHENOTHALLUS, (Hall.) 



S. latifoiius (P). (Hall.) A specimen handed me for examination by Mr. J. G. 

 Shepard, of Lebanon, O., resembles one of the figures (2 e) of the above named species, 

 on plate 68 Paleontology of N. Y., Vol. I, which Prof. H. says "may be the stem of this 

 plant." The specimen before me is nearly twice as long (over 3 inches) as the figure 

 referred to ; is somewhat sack-shaped, irregular wavy surface, finely striated longitudin- 

 ally, twisted and drawn in at the ends, and rounded under at the sides. It may be the 

 siem of S. latifoiius, but it certainly is not one of the "leaves." With more specimens to 

 compare, if it should prove distinct, I propose for it the specific name intoHus. The speci- 

 men lies on a small slab of limestone. 



Found by Mr. Shepard near Lebanon, O., middle beds of Cincinnati Group. 



GENUS TRACHYUM, (Billings.) 



Trachyum undosum. (sp. nov.) (James.) Fossil sub-circular in outline at the 

 edge of the cup ; irregularly and obtusely turbinate ; surface rough and undulating and 

 scattered over it, without any regularity, are circular oscula from i to 2 lines in diameter 

 — some places in groups — and canals passing at various angles into and in some cases, 

 apparently, through the fossil. The general surface occupied by very small pores, not 

 very distinctly shown. Cup shallow, surface very irregular, with circular oscula from I to 

 2 lines in diameter, and minute pores, as on the outside. Near the middle of the cup is 

 an appearance of something like a second growth between 2 and 3 inches in diameter and 

 ^ of an inch thick, where a portion is broken away. The interior shows a very delicate 

 fibrous structure, but is so compact as to be difficult to make out clearly. 



The specimen from which this description is made, is between 6 and 7 inches in 

 diameter across the top of the cup and 3 inches in height; other specimens, seemingly 

 the same species, are altogether different in outlines — some fragments appearing almost 

 like flat horizontal expansions, these may be parts only, of a much larger growth ; there 

 is no distinguishable difference in the internal structure and surface markings. One small 

 example, circular in outline at the margin of the cup (?), apparently the same species, is 

 only one inch in diameter; cup shallow; regularly convex on the under side with 6 cir- 

 cular oscula, each about )^ a line in diameter, at and near the center, 3 of them confluent 

 and others distributed irregularly over the surface. 



