| A | B |
| rostrum | tip of nose |
| nasal capsules | the nose |
| olfactary foramen | the holes for nerves to pass in the eye socket |
| external naris | holes at bottom of nasal capsules |
| otic capsules | contain inner ear |
| orbits | contain the eye |
| epiphyseal foramen | contains the pineal body, rudament of median of third eye |
| endolymphatic fossa | pass trough the endolymphatic ducks |
| foramen magnum | the spinal cord passes through |
| occipial condyles | articulate with first vertebre |
| palatoquadrate cartilages | 1st gill arches |
| meckel's cartilages | 1st gill arch |
| hyoid arch | 2nd gill arch |
| hyomandibular | directly under the otic capsule |
| ceratohyal | directly under the hyomandibular |
| basihyal | pt. coming off ceratohyal |
| pharyngobranchial | below vertebre column |
| epibranchial | below pharyngobranchial |
| ceratobranchial | below epibranchial |
| hypobranchial | below ceratobranchial |