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Cincinnati Society of Natural History. 



" After careful comparison of these fossil jaws with recent examples of 

 the order Annelida Polychseta or Nerida, I find specimens belonging to the 

 families of Eunicea, Grube; Lycoridea, Grube; and Glycerea, Grube. 

 * * * The only genus represented in the family Lycoridea, as fossil 

 is Nereidavus, Grinnell." 



Dr. Hinde published another valuable contribution on this subject the 

 following year {Quart. Jour, of the Geol. Soc. Lond., Vol. XXXVI., 

 1880), "On Annelid Jaws from the Wenlock and Ludlow Formations of 

 the West of England," in which he says there is no striking difference in 

 form of the English fossil jaws and American, but, as a rule, the Ameri- 

 can forms are the larger. 



And another in 1882, "On Annelid Remains from the Silurian Strata 

 of the Isle of Gotland, Communicated to the Royal Swedish Academy of 

 Sciences," which was published in Stockholm, in pamphlet form, with 

 three plates of 77 figures. This paper contains the result of collections 

 made by Dr. H. himself in the Isle of Gotland. He found the Annelid 

 remains similar to those already described from England and North 

 America, many of them identically the same species; detached and 

 scattered through the rocks in the same confused manner. He says: 

 " Until some complete forms are discovered, showing the constituent plates 

 of the jaw-armature in their relative positions, which, judging from my 

 own experience, seems at present unlikely, we shall have to be content 

 with a description of these detached jaw plates based upon their nearest 

 resemblance to those of existing forms." 



After listening to the reading of Dr. Hinde's papers (published in the 

 35th volume of the Quart. Jour. Geol. Soc, Lond.,) Dr. Woodward ex- 

 pressed his admiration of the labor and research displayed in these papers. 

 He was satisfied that the conclusions as regards the Annelid jaws were 

 correct; but that the Conodonts belonged to Myxinoid fishes he thought 

 was more doubtful, and suggested that they might possibly be the lingual 

 armatures of Nudibranchs. Though some of the Annelid jaws were not 

 unlike the maxillipeds of Crustacea, the Conodonts had no such resemblance." 



The weight of evidence seems to favor the view that Conodonts are the 

 jaws and lingual teeth of Mollusks, and that the objects referred to Anne- 

 lids belonged to very different organisms. 



Some important facts and suggestions bearing upon this subject may be 

 found in the August number, 1884, p. 776, of the American Naturalist. 



" On the Constitution of Some Appendages of the Mollusca," by Prof. W. 

 H. Dall. 



Both Conodonts and Annelid jaws are found together, in the same 



