Synopsis of the extinct Batrachia, Reptilia and Aves of North America Author Cope, E. D. text Transactions of the American Philosophical Society 1869 11 1 252 journal article 25568 10.5281/zenodo.3407624 619e0b96-ba2b-4552-98a7-cdacb88d03e3 3407624 SYMPHYPODA . First series of tarsal bones confluent with each other, and with the tibia.* Fibula distally much reduced. Anterior part of ilium dilated, plate-like. Genera Ornithotarsus, Cope. Compsognathus ; Wagner Abhandl. Mathem. Nat. Classe Miinchen Bd. IX. The latter, says Gegenbaur, is the form among terrestrial Saurians nearest the birds, as Archaeopteryx is the avine type nearest the Saurians. From the upper Jurassic slates of Solenhofen. I add a few of its characters from Wagner. Inner toe represented by a rudimental metatarsus. Whole foot a little larger than femur; humerus one-half femur. Of the only known species, C. gracilis, Wagner gives the following measurements; Length of head, 2 " 6 '" ( French )of vertical column to opposite acetabulum, 10"; of anterior extremity, 4" 7"'of posterior, 9" 3"'.