Page:Two Undescribed Specimens of Castoroides ohioensis Foster from Michigan.pdf/1

Rh There is adequate provision for technical training, secondary and higher training for every child who shows any special gift for taking advantage of it, and I consider that this fact is a greater menace to our trade than any arrangement of tariffs."

At Cornell University Assistant Professors O. A. Johnson and M. F. Barrus have been promoted to full professorships in the department of plant pathology, respectively.

At Hamilton College Professor Nelson Clark Dale, assistant professor of geology at Princeton University, will succeed Professor W. J. Miller, who goes to Smith College.

eldest son of the late Sir George Darwin, has been appointed mathematical lecturer at Christ's College, Cambridge.



are two specimens of  in the collection of the museum of geology, University of Michigan, that were found in the state and have not been recorded. One of these was discovered near, , in December, 1892, by A. G. Williams. It is represented by the base and upper part of the right with the  and all of the  teeth in position, the base of the left mandible, and the left incisor tooth. The incisors are well preserved and show the longitudinal and cutting edge, but the tip and base of each are broken. The row of molar teeth is 75 mm. long.

The second specimen, a skull without the mandibular bones, was exhumed in a swamp in, , by J. B. Steere, in 1902. It was lying on a bed of gravelly and beneath three feet of  soil. The skull is hard, of a rich dark brown color, and is little damaged. The left is broken, and the teeth, with the exception of the last molar on the left  side and the right incisor tooth, are missing. Nearly the full length of the right incisor is represented, the only damage to the tooth being an injury to the outer surface and the loss of a few millimeters from the base. The double nature of the internal nasal orifices is well shown. The measurements are as follows:

Mm.

The writer is indebted to Professor E. C. Case, of the department of geology, University of Michigan, for permission to publish these records. 1em 1em 2em 

In this volume Professor Kellicott endeavors to give a compact though comprehensive account of the development of the Chordates, such as will be suitable for the student of general embryology. for this purpose the frog is taken as representing the type, or rather, one should say, the mean, of chordate development, and a full and connected account is given of its early development and organogeny. This account is, however, preceded by an excellent statement of the embryology of Amphioxus, the author believing that whether or not this represents a truly primitive type of development, "it affords, in simple diagrammatic style, the essentials of early Chordate development," while its specialized later stages "may serve to put the student upon his guard