File:Six-gill shark.jpg

sixgill shark Source: http://oceanexplorer.noaa.gov/explorations/04deepscope/logs/aug9/media/sixgilled.html License: English applies to jurisdiction:

Ganoidei.—Are the Ganoids a Natural Systematic Position of Lepidosteus. Gill on the Ganoids as a Series — Natural Group i CHAPTER THE GANOIDS II

"Retjos Jichancas" in 1917 - The Monticola (IA monticola1917west) (page 200 crop).jpg

different Explorers up to the present time w TpE HlgTOf^Y OF EXpLopow jpgT^uiyi FROM 1788 TO 1888 Compiled from State Documents, Private Papers

Clarence Edgar Sherman 1911 (page 66 crop).jpg