PALEONTO LOGIC CONTRIBUTIONS 8l 



Septameroceras (?) sp. 



Plate 27, figure 1 ■ 



Among the fossils cited from the Pittsford shale and inter- 

 calated dolomite layers by Mr Sarle 1 is a " pentalabiate Gom- 

 phoceras." The specimen to which Mr Sarle obviously had refer- 

 ence is here figured merely to establish the occurrence of cepha- 

 lopods of the Septameroceras or Pentameroceras type in that 

 formation. The dorsal margin of the brachial area is not suffici- 

 ently well preserved to indicate whether it was concave or also 

 provided with lobes. Apparently there were two small lobes there, 

 making the form transitional between Pentameroceras and 

 Septameroceras. 



Protonympha marcellensis nov. 

 Plate 2g, figure 6 



Prof. Charles S. Prosser found in a concretion in the Marcellus 

 shale on the south side of Bennett hill, i 1 /^ miles southeast of 

 Clarksville, the fossil here described. It consists of a curved, 

 flattened, lanceolate body which is composed of about forty-eighit 

 segments that decrease in size toward the pointed extremity of the 

 fossil. The segments are annular and separated by a distinct linear 

 depression. On the concave margin scales that closely overlap 

 posteriorly and correspond to the annulations in number are seen. 

 Near the blunt extremity of the fossil they are lacking, probably 

 only through an accident of preservation or a twisting of the body. 

 Where the scales are broken away, darker, circular, clearly out- 

 lined scars with a central depression are observed. The opposite 

 margin is entirely unbroken and without appendages. At the blunt 

 end the segmentation terminates abruptly and the extremity itself 

 is formed by an elongate semioval body, on both sides of' which 

 are observed falcate appendages that are directed opposite to the 

 scales on the segments. Posteriorly there extends from this ter- 

 minal body a distinct rounded ridge along the median line for about 

 one-fourth of the length of the fossil, where it abruptly changes 

 into a shallow, median depression. Over the segments there are 

 scattered many irregularly curved filiform markings suggestive of 

 setae. 



The taxonomic position of this puzzling fossil will probably not 

 be conclusively determined until more material is obtained. We have 



1 Rep't N. Y. State Pal. for 1902, p. 1085. 1903. 



