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 […]

Since the method of treating snakebite-poisoning by hypodermic injections of strychnine, discovered by the writer and published but a few years ago, has already been adopted by the medical profession throughout the Australian colonies, and practised even by laymen in cases of urgency with much success, it has been repeatedly suggested to him that the […]

The common garter snake (_Thamnophis sirtalis_) has by far the most extensive geographic range of any North American reptile, covering most of the continental United States from the Atlantic to the Pacific and from south of the Mexican boundary far north into Canada and southeastern Alaska. Of the several recognized subspecies, the eastern _T. s. […]

The systematic status of the populations of lizards assignable to _Cnemidophorus sacki_ in western México (Sonora southward to Jalisco) has been reviewed in detail by Zweifel (1959, Bull. Amer. Mus. Nat. Hist, 117 (2):57-116), who stated that the use of the specific name _sacki_ for the western populations rests upon a reasonable, but as yet […]