Key To SKELETON oF THE PERCH 
. Frontal bone. 
. Pre-frontal bone. 
Ethmoid bone. 
Post-frontal bone. 
Basi-occipital bone. 
Basi-sphenoid bone. 
. Parietal bone. 
. Supra-occipital bone. 
. Paroccipital bone. 
. Exoccipital bone. 
. Alisphenoid bone. 
. Mastoid bone. 
: Squamosal bone. 
. Orbitosphenoid bone. 
. Basisphenoid bone. 
. Vomer. 
. Inter- 
or Pre-maxillary 
bone. 
. Maxillary bone. 
. Infra-orbital ring. 
. Turbinals. 
. Palatine bone. 
. Hyomandibular bone. 
. Pterygoid bone. 
. Entopterygoid bone. 
. Quadrate bone. 
. Metapterygoid bone. 
. Operculum. 
. Stylohyal bone. 
. Preoperculum. 
. Symplectic bone. 
. Suboperculum. 
. Interoperculum. 
. Dentary. 
. Articulary. 
. Angular bone. 
} 
Epihyal and Ceratohyal 
bones. 
41 
42. 
43- 
46. 
47- 
48. 
49» 
(2) 
5 
, 
53 
55: 
58. 
59- 
39- 
40 
. 
cI. 
[Oe 
53° 
54: 
aa 
. Caudal vertebre. 
. Hypural bone. 
. Caudal rays. 
. Ribs. 
. Epipleural spines. 
. Interneural spines. 
. Dorsal rays. 
Basihyal bones. 
Glossohyal bone. 
Urohyal bone. 
Branchiostegal rays. 
Post-temporal bone. 
Supraclavicula. 
Clavicula. 
|Post-clavicula 
Coracoid (radius) bone. 
Scapula (ulna). 
Carpals and metacarpals. 
Basibranchials. 
Ceratobranchials. 
Upper epibranchial of first 
branchial arch. 
. Epibranchials. 
. Upper pharyngeals. 
. Gill-rakers. 
Abdominal vertebre. 
First interneural spine. 
. Rudimentary caudal 
rays. 
. Interhemal spines. 
. Pubic bones. 
. Ventral spine. 
