466 AUETS: 
DESCRIPTION OF PLATE XXXHII. 
INDEX LETTERS. 
ana __ Anterior nasal aperture,or nasal | fc Palatine canal. 
tube. PMX Premaxillary. 
ANT Antorbital. pna Posterior nasal aperture. 
AUP Auto-palatine. POR! First postorbital. 
DP  Dermo-palatine. POR? Second postorbital. 
ECP Ectopterygoid. ppe Canal for ramus palatinus poste 
ENP Entopterygoid. rior facialis between the auto- 
ETH Ethmoid. and dermo-palatine bones. 
FR Frontal. PRE  Preorbital ossification ; prefron- 
JSG Jugal, or supramaxillary. tal of Sagemehl. 
LA Lachrymal. ES; Parasphenoid. 
MX Maxillary. PSF  Postfrontal. 
NA Nasal. PST  Postorbital ossification. 
olfr Olfactory foramen. SO} First suborbital. 
os Orbitosphenoid. SOR? Second suborbital. 
pafr Foramenforramus palatinusan- | SJ7X Septomaxillary. 
terior facialis. VO  Vomer. 
EXPLANATION OF PLATE. 
Fic. 1. Side view of anterior half of skull of adult Amia, with the fibrous and 
ligamentous tissues connecting the bones left in place. X 2. 
Fic. 2. Same as above, with the nasal, antorbital, lachrymal, and suborbital 
bones removed. X 2. 
Fic. 3. Top view of same skull. On the right side the ethmoid, nasal, and 
antorbital bones have been removed. On the left side all the canal bones have 
been removed. X 2. 
Fic. 4. Same as Fig. 3, with the premaxillary bone and the palato-quadrate 
arch removed on the left side. X 2. 
Fic. 5. Bottom view of same skull. The left side is undissected and shows 
the dorsal surface of the mouth cavity. On the right side the tissues covering the 
bones have been removed. The parasphenoid is cut somewhat shorter than the 
other bones. X 2. 
Fic. 6. Same as Fig. 5. On the left side the tissues covering the bones have 
been removed, as on the right side of Fig. 5. On the right side all of the dermal 
bones have been removed excepting the parasphenoid. X 2. 
