674 NEW YORK STATE MUSEUM 



Body long, slender, of approximately equal width, distinctly 

 segmented, segments about half as long as wide, apparently con- 

 vex, each provided with five to eight annulations and long setae 

 on one side (dorsal side?) which apparently were not tufted. 



Posterior end not well observed, apparently rounded. 



Dimensions. Type specimen: length 13 mm, or more, (speci- 

 mens of much greater length observed), width 1.2 mm; length of 

 segment .7 mm, length of setae 1.4 mm. 



While, with the material at hand, the exact systematic position 

 of this worm could not be established with certainty, it seems 

 clear that this type belongs to the class Polychaeti. To express 

 this taxonomic date the generic term, Eopolychaetus, is 

 proposed for worms with similar, slender, cylindric, regularly 

 annulated bodies and long non-tufted setae on one side. The 

 presence of another worm with setae was made known by E. 0. 

 Ulrich, who found tufts of long setae in the Cincinnati group 

 (Jour. Cin, soc. nat. hist, 1878. 1:91). 



Pontobdellopsis cometa, gen. et spec. nov. (see pi. 1, 

 fig. 14-18) 



Body cylindric or rather long conical, regularly tapering and 

 abruptly terminating (with ring-like section) at wider end. 

 Other (anterior?) end provided with chitinous disk, the latter 

 sometimes with central depression. 



Segmentation coarse; 6 segments in 2.9 mm; segments smooth, 

 apparently not annulated; no appendages observed; test thick 

 (strong carbonaceous film). 



Dimensions. Length of largest specimen observed, 11.7 mm 

 and width at broadest end, 1 mm. 



This small but common and characteristic form has been 

 termed Pontobdellopsis in allusion to its similarity to the 

 recent genus Pontobdella, from which, however, no close 

 systematic relationship of the fossil with that highly specialized 

 genus of recent worms is claimed. 



The form is most common in the Utica shale of the Rural ceme- 

 tery near Albany, but it has also been observed in the lower 

 Utica shale of Mechanicsville. 



