130 



SPECIMENS OF CETACEA. 



history is attached to the specimen, but it may have 

 been in the Knox Collection. 



Skull, with mandible broken. Length of skull 13^ inches, 

 breadth 7| inches; beak 7 inches long, 4 inches broad 

 at base ; nasals and frontal in same plane ; premaxillse 

 in front of nares a little concave, then flattened and 

 slightly convex towards pointed tip ; pterygoids 

 moderate, meeting mesially. Teeth small, acute, 

 25 25 



2() 26' 



Symphysis, length 1| inch. Purchased 1879. 



4. Tympano-periotic bones, articulated left; tympanic 1| 

 inch long, | inch broad, height | inch ; outer surface 

 convex anteriorly, flattened posteriorly, lip-like process 

 with the groove in front scarcely marked on this 

 surface ; inner surface I inch in height, rapidly 

 sloping to Eustachian orifice ; bilobed, outer lobe the 

 larger, smooth, rounded, inner laterally compressed ; 

 cleft deep, short, inferior surface broad, almost flat ; 

 inner border marked by ridge, outer not so distinct 

 and blends with outer surface ; cavity opens by 

 moderate mouth close to anterior end of inferior 

 surface. See flgure below. Periotic 1| inch long, | 

 inch broad ; meatus wide ; right bone retained in skull. 

 From No. 1. Donor — Rev. Dr Joass, Golspie. 



5. Pectoral Limb of No. 1, radiograph of, showing the bones 

 and the centres of ossification, v, 5th digit. 



