Produced by Chris Curnow, Tom Cosmas, Joseph Cooper and the Online Distributed Proofreading Team at https://www.pgdp.net ===================================================================== UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY ------------------- Volume 18, No. 2, pp. 11-35 ------------------------- October 15, 1968 -------------------------- Cranial Osteology of the Hylid Frog, Smilisca baudini BY LINDA TRUEB UNIVERSITY OF KANSAS LAWRENCE 1968 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors of this number: Frank B. Cross, William E. Duellman, Philip S. Humphrey Volume 18, No. 2, pp. 11-35 Published October 15, 1968 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY ROBERT R. (BOB) SANDERS, STATE PRINTER TOPEKA, KANSAS 1968 [Union Label] 32-3686 Cranial Osteology of the Hylid Frog, Smilisca baudini BY LINDA TRUEB INTRODUCTION The paucity of descriptive cranial anatomical work dealing with hylid frogs was pointed out by Trueb (1966) in her paper describing the cranial osteology of _Hyla septentrionalis_. Comparative studies on the cranial osteology of the genus _Smilisca_ (Duellman and Trueb, 1966), along with other more brief descriptions, reveal variation among cranial characters of hylids. Since these external characters have been useful in defining species, species groups, and genera, it seems worthwhile to pursue correlated studies on internal cranial structure. The following account dealing with the Neotropical tree frog, _Smilisca baudini_ Dumeril and Bibron, 1841, is the first published description of the internal cranial anatomy of a hylid frog, and supplements the recent account (Duellman and Trueb, 1966) of external cranial osteology of the same species. Comparative studies of hylid skulls are expected to yield information of taxonomic importance. I am grateful to Richard J. Baldauf of Texas A & M University and William E. Duellman of the University of Kansas for critically reading the manuscript and offering helpful suggestions. The findings reported here result from research on Middle American hylids supported by a grant from the National Science Foundation (GB-1441) to William E. Duellman. Materials and Methods