Lying between the Gulf of Mexico and the Laguna Madre de Tamaulipas is a narrow barrier island extending from the delta of the Rio Grande south for 140 miles to within 185 miles of Tampico, Tamaulipas. This island, like most of coastal Tamaulipas, has been all but neglected by zoological collectors. Consequently, little is known […]

Pliocene and Pleistocene Records of Fossil Turtles from Western Kansas and Oklahoma – University of Kansas Publications Museum of Natural History Volume 1. In the vertebrate paleontological collection at the University of Kansas Museum of Natural History there are many fragments of turtles that have been collected, generally in connection with the excavation or recovery […]

A New Tortoise, Genus Gopherus, From North-central Mexico. Gopherus flavomarginatus new species Holotype._–U.S. National Museum 61253, adult; stuffed specimen with disassociated skull; 30 to 40 miles from Lerdo, Durango, Mexico; obtained by Dr. Elswood Chaffee, 1918. Paratypes._–USNM 61254, adult, stuffed specimen with skull in place, other data the same as those for holotype; USNM 60976, […]

A New Supspecies of Slider Turtle (Pseudemys scripta) from Coahuila, Mexico. In September, 1958, the author and two colleagues collected a large series of _Pseudemys_ in small ponds and in a river in the basin of Cuatro Ciénegas, Coahuila. The specimens prove to represent a previously unrecognized subspecies of _Pseudemys scripta_. The subspecies is named […]

Holotype._–University of Kansas Museum of Natural History No. 7676, vertebrate paleontological collection, a turtle consisting of a fragmental anterior portion of a carapace, left part of the plastron, and several marginals collected by the 1946 paleontological field party of the University of Kansas Museum of Natural History. Geological Age and locality._–Marl beds of the Laverne […]

Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz by Legler The ornate box turtle, _Terrapene o. ornata_ Agassiz, was studied more or less continuously from September, 1953, until July, 1957. Intensive field studies were made of free-living, marked populations in two small areas of Douglas County, Kansas, in the period 1954 to […]

Examination of softshell turtles allied to _Trionyx muticus_ from the southeastern United States discloses the presence of an undescribed subspecies inhabiting river systems of the Gulf Coast. The author is indebted to Mr. Roger Conant for constructive criticism of the manuscript. I am grateful also to many fellow students for assistance in field work or […]

As a part of a study of the herpetofauna of the Mexican state of Michoacán an attempt was made to ascertain the interspecific and intraspecific relationships of the various populations of _Pituophis_ there. Field work in Michoacán revealed that two supposed subspecies of _Pituophis deppei_ were sympatric. This discovery led to the examination of all […]

Systematic Status of the Colubrid Snake, Leptodeira discolor Gunther by Duellman At the time of completing my study of the genus _Leptodeira_ (1958) I had seen no specimens of _Leptodeira discolor_, a species described by Günther in 1860 and subsequently referred to the genus _Hypsiglena_ by Cope (1887), Boulenger (1894), and Mocquard (1908), and to […]

Need for a comprehensive systematic review of the snakes of the genus _Conophis_ was pointed out by Stuart (1954a, b). Since these snakes appeared to be of zoogeographic importance in the Central American region, I undertook the review as set forth on the following pages. Of the 325 specimens of the genus _Conophis_ available to […]