CONTENTS. 



Gen. 120. Myliobatis 



Sp. 246. M. aquila. Eagle Ray. PI. XXXII. 

 Gen 121. Cephaloptera 



Sp. 247. C. yiorna. Homed Ray 



PAGE 



335 

 335 



336 

 337 



XXX. FAMILY OF LAMPREYS. PETROMYZID^E. 



Gen. 122. Pteromyzon . . . .339 



Sp. 148. P. marinus. The Lamprey. PI. XXXIII. 339 



149. P.fluviaiilis. River Lamprey . . 340 



150. P. Planeri. Planer's Lampem . ; 341 

 Gen. 123. Ammoc(etes .... 342 



Sp. 25 1 . J. . hranchialis. The Pride, or Mud Lamprey. 



PI. XXXIII 342 



Gen. 124. Gastrobranchus . . . 343 



Sp. 252. O. ccBcus. Myxine. PI. XXXIV. . 343 



Gen. 125. Amphioxus .... 344 



Sp. 253. A. lanceolatus. The Lancelot. PI. XXXIY. 344 



SYNOPSIS . 



Portrait of Humboldt 

 Vignette Title-page . 



34/ 



In all Thirty-six Plates in this Volume 



