PLATE VI. 



CETACEAN TYMPANIC BONES. 



1, 2, 3, 6, 8, 10, 11, right side ; 4, 5, 7, 9, left side ; a, inner aspect, b, seen from 



below. 

 All figures half natural size, and all from Red Crag Nodule-bed, except 1, 6, and 7. 



1, BAL^ENA BISCAYENSIS, Gray. Forest-bed, East Runton. 



Savin Coll., Cromer. 



2, , b. BAL.ENA PRIMIGENIA, V. Beneden. Woodbridge, M. P. G. 



3, BAL^ENA AFFINIS, V. Beneden. Woodbridge. M. P. G. 



4, a, b. BAL^ENA INSIGNIS, V. Beneden. Woodbridge. M. P. G. 



5, a, b. BAL^ENA BAL^NOPSIS, V. Beneden. Felixstow. M. P. G. 



6, a, b. MEGAPTERA AFFINIS, V. Beneden. Coralline Crag, Sud- 



bourn. M. P. G. 



7,a,6. MEGAPTERA MINUTA, V. Beneden. (After Lydekker). 

 Coralline Crag, Suffolk. Ipswich Mus. 



8, a, b. BAL^ENOPTERA DEFINITA, Owen. Felixstow. Rickman 



Coll., M. P. G. This figure has been accidentally 

 reversed. 



9. BAL^ENOPTERA EMARGINATA, Owen. Felixstow. Presented 



by Mr. H. B. Woodward to M. P. G. 



10, a, 6. CETOTHERIUM DUBIUM, V. Beneden. Felixstow. M. P. G. 



11, a. b. HERPETOCETUS SCALDIENSIS, V. Beneden. Felixstow. 



M. P. G. 



