SPECIMENS OF CETACEA. 



The Airthrey and Longniddry whales corresponded closely in these 

 dimensions, and as the latter was nearly 79 feet long, Air Bald's 

 estimate of 72 feet scarcely perhaps gives the full length of the 

 Airthrey specimen. Both animals much exceeded the dimensions of 

 B. musculus. 



The condyls of the Airthrey skull were separated in front by a 

 groove 2 inches wide, whilst behind they were 4| inches asunder. 

 The foramen magnum was almost a circle, and measured 5|^ by 

 5| inches. The vertex border of the bone was not pointed, but had 

 a convex curve 18^ inches long. 



One lumbarvertebra had been retained in the Eoyal Scottish Museum, 

 a massive bone, 3 ft. high and 3 ft. 5 in. between the tips of the trans- 

 verse processes; the spine was 1 ft. 10 in, long, the body 15 in. by 12 

 in. It resembled the lumbar vertebrae of the Longniddry B. sihhaldi. 

 Eight ribs were still preserved in the Museum. One, a second rib 

 with a distinct capitular process, measured 8 feet 4 inches along the 

 curve from the articular tubercle to the opposite end, wdiilst the 

 chord of the arc was 6 feet. Another was 9 feet 5^ inches along the 

 curve ; the chord was 7 feet 6-| inches. Another, though somewhat 

 broken at one end, was 9 feet 7 inches along the curve ; it had been 

 fractured near one end during life, as Mr Bald had noted, but had 

 become repaired, and was thickened at the place of fracture. The 

 shortest rib, evidently one of, if not the hindmost, was 5 feet 

 5A inches along the curve, and the chord was 4 feet 1 inch. From 



