THE CRANIAL ANATOMY OF THE MAIL-CHEEKED FISHES. 



Contents. 



Introduction 1 



I. LORICATI 3 



I. SCORPAENA 3 



1. Skull 3 



Subquadrangular groove 6 



Temporal Fossa 8 



Dilatator Fossa 13 



Mesethmoid 13 



Ectethmoid 14 



Vomer 17 



Parasphenoid 22 



Premaxillary 23 



Rostral 28 



Maxillary 28 



Nasal Sac 31 



Nasal 32 



Frontal 32 



Postfrontal 33 



Parieto-extrascapular 34 



Lateral Extrascapular 35 



Suprascapular 35 



Supraclavicular 35 



Lateral surface of the Brain Gase ... 36 



The Orbit 38 



Orbitosphenoid 39 



Alisphenoid 39 



Sphenotic 41 



Basisphenoid 42 



Proötic 43 



Myodome .50 



Carotid arteries and vessel x . . . . 51 



Pterotic 55 



Basioccipital 56 



Exoccipital 57 



Opisthotic 58 



Epiotic 58 



Supraoccipilal 59 



Cranial Cavity 59 



2. Infraorbital Chain of Bones 61 



3. Suspensorial Apparatus and Mandible . . 62 



Quadrate 63 



Metaplerygoid 64 



Ectopterygoid 65 



Entopterygoid 65 



Palatine 66 



Hyomandibular 67 



Symplectic - 68 



Preopercular 68 



Opercular Bones 69 



Mandible 69 



4. Adductor Mandibulae and Levator Arcus 



Palatini Muscles 71 



5. Latero-Sensory Canals 72 



6. Nerves 76 



Nervus Olfactorius 78 



Nervus Opticus 78 



Nervus Oculomotorius 78 



Nervus Trochlearis 79 



Nervus Abducens 79 



Trigemino-Facialis Complex 80 



a. Roots and Ganghon oflhe Complex 80 



b. Truncus Ciliaris Profundi ... 82 



c. Nervus Trigeminus 83 



d. Nervus Facialis 85 



Nervus Acusticus 91 



Nervus Glossopharyngeus 91 



Nervus vagus 92 



a. Nervus Lineae Lateralis Vagi . . 92 



h. Nervus V'agus 92 



