Dhservafions on Fossil Annelids. 89 



iiig from a median line in a backward direction, the depressions 

 probabl}' representing the casts of the pedal appendages. This genus 

 I believe will be found to be nearly related to 2^'ereidacus, if not iden- 

 tical with it, but this can not be ascertained from the material col- 

 lected to the present time. The next evidences recorded are from the 

 Carboniferous of Illinois, from where Meek and Wortheu described 

 their Anthrncerpes typus ; these gentlemen at first referred the genus 

 to the Jfi/riapoda, but afterwards admitted its afflnites with the worms. 

 This, I believe, is the entire list (if we except ScoUlhus, which are 

 considered to be worm burrows b}' some paljieontologists) of the re- 

 corded genera and species of worms found in the American Paljeozoic 

 rocks, and all must admit that it is a very short one, but I propose to 

 lengthen it somewhat b}- adding several forms. The circumstances 

 under which the^' were found, are as follows: About two months ago, 

 while geologizing back of Covington, in company with Mr. Dickhaut, 

 we discovered a spot in which great numbers of the minute brvozoan 

 Arthoclema tenuis, James, and two specimens of Arthocleyna shafferi. 

 Meek, were found almost in their original perfection. Associated with 

 these, and well preserved, were numerous specimens of Serpulites disso- 

 littiis, a verj' frail species, described b}^ Billings, from the Trenton rocks 

 of Canada. 



That these fragile fossils are found in such a state of preservation, 

 shows conclusively that the strata were deposited rapidly and under 

 very favorable circumstances. Having ascertained this fact, we need 

 not be surprised at finding fossils, which, under less favorable conditions 

 would have been totally' destroj'cd, or preserved only in unrecognizable 

 fragments. 



The fossils alluded to are described below, and I believe they can not 

 be referred to any other class of animals than to the true worms. 



I have determined the following new genera and species. Protoscolex, 

 n. g., with four species: The P. covingtonensis, simjilex, ornatus, 

 and tenuis; Eotrophonia.i n. g., with one species, E. setigera. 



Protoscolkx, u. g. 



Bod}'^ ranging from a medium to a great length, of nearly uniform 

 width throughout its length ; body divided transversely by more or less 

 narrow, simple or papillated segments. Anterior and posterior ends 

 obtuseh' pointed, and, probably because the specimens are fossil, are 

 not distinguishable from each other. No setse or appendages of anj- 

 kind. 



Tj'pe, P. coixingtonensis. 



Protoscolex covingtonensis, n. sp. (Plate IV., fig. 2.) 

 Body long and A'ery slender, of uniform width, the chitonous sub- 



