This is a comprehensive catalog of the fish collection at the British Museum (Natural History), compiled by Albert Carl Ludwig Gotthilf Günther, a renowned ichthyologist and taxonomist. The catalog covers more than 12,000 specimens from all over the world, arranged according to their scientific names, families, and geographical distribution. The entries provide detailed descriptions, measurements, and references to other scientific works. This book is a seminal reference for fish researchers and collectors, as well as a testimony to the diversity and beauty of aquatic life. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.