"A New Tortoise, Genus Gopherus, From North-central Mexico" by John M. Legler is a scientific publication written in the mid-20th century. This book presents a detailed taxonomic study of a newly identified species of tortoise, "Gopherus flavomarginatus", which was discovered in north-central Mexico. The work contributes to the broader understanding of the Gopherus genus, highlighting both the physical characteristics and the distribution of this new species. The document outlines the features that distinguish "Gopherus flavomarginatus" from other tortoise species, including its unique shell structure, coloration, and size. It provides detailed descriptions based on various specimens, alongside synonymous observations from historical references and personal field notes collected by the author. Furthermore, the book delves into the tortoise's potential distribution range in Mexico and discusses anecdotal accounts suggesting its presence, underscoring the significance of this discovery in the context of biodiversity and conservation in desert ecosystems. The scientific rigor and detailed analysis make it a valuable resource for herpetologists and researchers interested in the taxonomy and ecology of North American tortoises. (This is an automatically generated summary.)