96 proceedings of the academy of [1889. 



April 23. 



The President, Dr. Joseph Leidy, in the chair. 



Twenty-two persons present. 



A paper entitled "On a new genus and two new species of 

 Ophiurans," by J. E. Ives, was presented for publication. 



Fossil Vertebrates from Florida. — Dr. Leidy exhibited some re- 

 mains of Zeuglodon recently obtained by Mr. Joseph Willcox, from 

 a quarry of nummulitic limestone, near Ocala, Marion Co., Florida. 

 They consist of a portion of the mandible with the mutilated re- 

 mains of two two-fanged molars, embedded in a mass of the lime- 

 stone, portions of several vertebrae and the crown of an anterior tooth. 

 They pertain to a large but immature animal, probably the Z. 

 cetoides In a crevice of the same quarry there was found an ac- 

 cumulation of bones of quaternary age. Among those preserved 

 and obtained by Mr. Willcox, was the skull of the Machairodus 

 described a few weeks ago, a number of teeth of a horse, the tooth 

 of a llama, and a premolar of the Elephas columbi. 



While in Florida Mr. Willcox, with his friend Wm. M. Meigs,visited 

 Arcadia, on Peace Creek, Avhere, through the kindness of Mr. T. S. 

 Morehead, superintendent of the Phosphate Mining Company, they 

 procured the collection of fossils now exhibited. They mainly con- 

 sist of the vertebra? of several small cetaceans, many teeth of a 

 horse not differing from those of the domestic animal, fragments of 

 deer antlers, of bones of other animals, and of turtle shells, teeth of 

 sharks, &c. Among them are some well-preserved teeth of a tapir, 

 Tapirus americanus. On a former occasion, through the Smith- 

 sonian Institution, from the Peace Creek locality, a collection was 

 received chiefly consisting of remains of a huge turtle and molar 

 teeth and the ramus of a mandible with a tooth of the Elephas 

 columbi. 



A specimen of particular interest in the collection under inspec- 

 tion is a first ungual phalanx or pastern bone of a diminutive three- 

 toed horse Hippotherium or Hipparion. It accords in size with an 

 upper molar tooth, from Archer, Fl., on which was founded 

 H. ingenuum, described in the Proceedings for 1885, p. 33. The 

 bone not much larger and nearly of the proportions of the corres- 

 ponding joint of our own middle finger indicates an animal of un- 

 usually slender build. Since describing the remains from Archer, 

 on which was founded the larger species, H. plicatile, in the Pro- 

 ceedings for 1887, p. 309, a pastern bone attributable to it has been 

 received from the same locality. It is actually shorter but of much 

 more robust form than that from Peace Creek, referred to H. in- 

 genuum. The comparative measurements of the two pasterns are as 

 follows : — 



