68 SPECIMENS OF CETACEA. 



BALEEN WHALES. 



Fossil and subfossil specimens. 



1. Tympanic bone, marked Balcena, strongly mineralised. 



From the Red Crag. Purchased. 



2. Tympanic bones, two, of uncertain species, smooth, 



polished, and strongly mineralised. 

 From the Suffolk Crag, Felixstowe. 



Donor — H. R. Pyatt, Esq. 



3. Tympanic bone marked Bahena emarginata, strongly 



mineralised. 

 From the Red Crag. Purchased. 



[Nos. 4 to 9 are from skeletons exposed in the clay 

 subsoil in the raised beach of the Carse of Stirling, 

 from the Collection formed by Sir Wm. Turner.] 



4. Skull of a Balceno'ptera subfossil, much injured ; approxi- 



mate length 9 feet 2 inches, greatest breadth 4 feet 

 6 inches ; outer edge of maxilla almost straight ; 

 greatest breadth of back of skull 4 feet 4 inches, 

 foramen magnum 4| inches by 5 ; length of vomer 

 8 feet 3 inches. Portion of the skeleton found in 

 Christie's Brickfield, Cow Park, Stirling, in blue clay, 

 in 1863 (see Introduction). The skull approaches in 

 size and proportions that of B. musculus, No. 1, in 

 the Museum, and may be regarded as that species. 



Donor — Corporation of Stirling. 



5. Mandible of the same specimen, not united at symphysis, 



coronoid distinct ; length along convex surface 9 feet 

 Ql inches ; length of chord of arc 9 feet 1^ inch ; girth 

 in front of coronoid process 25^ inches. 



Donor— Corporation of Stirling. 



6. Rib, 1st left, from the same skeleton. No. 4 ; length 3 feet 



5 inches on the curve, 2 feet on the chord of the arc. 

 The vertebral end has two distinct heads separated by 

 a cleft 6 J inches deep, which is prolonged as a groove 

 on to the body of the rib; the anterior head has a 

 definite articular surface, which is less strongly 

 marked on the posterior head. The bicipital end of 

 the 1st rib is a character which has been seen in 

 several specimens of B. borealis, though not present 

 in the skeleton of this whale in the Anatomical 

 Museum. See figure, p. 69. 



