ZEUGLODONT AND OF LEATHERY TURTLE. 



317 



of Professor L. DoUo, who lias done so niucli to elucidate the 

 history of this group of Chelonians. 



This specimen is of especial interest, because it appears to help 



Text-fiafure 3. 



luuer surface of part of carapace of Cosmochelys (B 4338). \ nat. size. 



c.p., costal plate; n.p., median epitliecal plate ; n.s., neural arcli ; r., ril). 

 A-B, line of section shown in text-tig. 2 and PI. II. fig. 4. 



