— III — 



Vomer 140 



Rostral 141 



Premaxillary 141 



Maxillary 141 



Nasal 142 



Frontal 143 



Postfrontal 143 



Parieto-Extrascapular 143 



Lateral Extrascapular 143 



Suprascapular 143 



Supraclavicular 144 



Parasphenoid 144 



Basisphenoid 145 



Orbitosphenoid 145 



Alisphenoid 145 



Sphenotic 145 



Dilatator operculi 145 



Proötic 145 



Myodome 146 



Basioccipital 146 



Exoccipital 147 



Opisthotic 147 



Epiotic 147 



Pterotic 147 



Supraoccipital 148 



2. Infraorbital Bones 148 



3. Suspensorial Apparatus and Mandible . . 151 



Preopercular 151 



Hyomandibular 151 



Suprapreopercular 152 



Symplectic 152 



Quadrate 152 



Metapterygoid 153 



Entopterygoid 153 



Ectopterygoid 153 



Dermo-Eetopterygoid 153 



Palatine 154 



Opercular 154 



Subopercular 154 



Interopercular 154 



Mandible 155 



4. Latero-Sensory Canals 155 



IV. DACTYLOPTERUS VOLITANS .... 156 



1. Skull 156 



Rostral 159 



Premaxillary 159 



Maxillary 159 



Ligaments 160 



Vomer 160 



Ectethmoid 161 



The Orbit 161 



Parasphenoid 164 



Basisphenoid 164 



Alisphenoid 165 



Sphenotic 165 



Proötic 165 



Pterotic 167 



Basioccipital 169 



Exoccipital 169 



Epiotic 170 



Supraoccipital 171 



Opisthotic 171 



Nasal 171 



Frontal 172 



Postfrontal 172 



Parietal 172 



Lateral Extrascapular 172 



Mesial Extrascapular 172 



Suprascapular 172 



Supraclavicular 174 



2. Infraorbital Chain of Bones 174 



3. Suspensorial Apparatus and Mandible . . 175 



Preopercular 175 



Hyomandibular 176 



Symplectic 177 



Metapterygoid 178 



Quadrate 178 



Ectopterygoid 178 



Entopterygoid 179 



Palatine 179 



Mandible 179 



Opercular 180 



Subopenular 180 



Interopercular 180 



4. Latero-Sensory Canals 180 



III. MYODOME 183 



Summary 204 



Bibliography 209 



Index to Fishes etc.. referred to 213 



Explanation of Figures 216 



1. Index Letters 2 IG 



2. Explanation of Plates '_! 1 7 



