28 TRANSACTIONS OF THE [nOV. 16^ 



then known. This has the general form of that of Diniahthys, 

 the posterior end flattened, spatulate, and evidently buried in 

 cartilage, which composed tlie angular and articular portions of 

 the jaw, as in all tlie family of the Dinichthidce, including 

 Coccostens, and perhaps of all the Placoderms. 



The anterior and exposed extremity of the jaw was provided 

 with a row of conical acute teeth along its upi)er margin as in 

 Dinic]ithri!< Hcrfzcri, but instead of turning up to form a pow- 

 erful penetrating tooth, it was deflected laterally so that the ex- 

 tremity of the lower jaw was forked, while a row of four strongly 

 recurved teeth was set on eitiier side of the symphysis; the whole 

 forming a sort of rake which would be especially efficient in 

 capturing eel-like fishes, if such served for its food. But as a 

 forked jaw would be liable to s})lit at the symphysis, the lower 

 mandibles were there firmly l)ound together by a strong liga- 

 ment, of which the point of insertion is marked by a deep and 

 roughened i)it. 



Of this remarkable fish a few additional fragments have been 

 found which enable me to complete the mandible, and indicate 

 a fish of larger size than would be inferred from the unirpie jaw 

 formerly exhibited to the Society, and which served as the basis 

 of the generic description. 



November 16, 1885. 



Stated Meeting. 



The President, Dii. J. S. Newberry, in the chair. 

 Forty persons present. 



Dr. S. S. Friedrich exhibited several Indian stone ornaments 

 and utensils. Also some fossiliferous pebbles of corniferous 

 limestone from near Sandusky, Ohio. 



Dr. N. L. Britton reported the discovery by Messrs. A. Hol- 

 lick, W. T. Davis, and himself, of fossil leaves in the cretaceous 

 clays at Kreischerville, Staten Island. The specimens were ob- 

 tained from a stratum of lignitic clay about eighteen inches in 

 thickness, and included angiosperms and conifers. Several reeds 

 were also collected. 



The excavation from which they were taken is about three- 

 fourths of a mile north from Mr. B. Kreischer's fire-brick fac- 

 tory. The section exposed is as follows : 



