45 



153. The left moiety of a vertically-bisected posterior division of the cranium of a 

 Cod-fish (Gad** morrkua) ; showing the large cavity or ' otocrane ' lodging the 

 luln nnth. The lower comportment, lodging the sacculus and otolitcs, is formed 

 by the baaioccipital and the largely developed petrosal : the semicircular canalu 

 traverse compartments of the otocrane, formed by the exoccipital, |>oroccipital, 

 superoccipital, mastoid and alisphcnoid. Hunteria*. 



154. A natural skeleton of the head of a Cod-fish (Gadua morrhua). On the right 



side the bones are numbered on coloured tickets corresponding with the dis- 

 articulated specimen No. 146 ; on the left side the suborbital and supratcm- 

 poral and labial scale-bones are preserved, and each bone has its name placed 

 upon it. Hunteria*. 



155. The skull of a Cod-fish (Coda* morrkua), with the integuments and branchial 



arches . showing the premaxillary, premandibular, vomcrine, branchial and 

 pharyngeal teeth. The branchial teeth arc supported on tubercles projecting 

 from the concave sides of the branchial arches. Hnnteria*. 



156. The tympano-uiandibular and hyoidean arches, with the pterygoid bones of a 



Cod-fish (Gadtt* morrkua). The numbers indicate the names of the bones 

 according to Table I. Presented by Sir B. C. Brodie, Bart., F.R.S. 



157. The left side of the tympano-mandibular arch, with its opercular appendages 



and the pterygoid and entopterygoid bones of a Cod-fish (Gadus morrkua). 

 These and all the other bones are indicated by the numbers according to 

 Table I. Pretexted by Sir B. C. Brodie, Bart., F.Jt.S. 



158. The tympanic pedicle with the pterygoid and preopercular bones of the Cod* 

 fish (Gadmt morrkua). All the bones are numbered according to Table I. 



Presented by Sir B. C. Brodie, Bart., F.B.S. 



159. The opercular, preopercular and subopercular bones of the same fish. 



Presented by Sir B. C. Brodie, Bart., F.Jt.S. 



