EXPLANATION OF THE CUTS AND OF THE LITHOGRAPH. 



Fig. 1. Beluga rhinodon Coi)e cranium, from above ; from Upernavili. 



Fig. la. Beluga rhinodon teeth. 



Fig. 2. Beluga declivis Cope scapula. 



Fig. 3. Beluga angustata Cope scapula. 



Fig. 4. Bala?na c u 1 1 a m a c h Chamisso ; from north west coast ; propor- 

 tions approximate. (Capt. Scammon does not represent the re- 

 curved rictus figured hy Chamisso. 



Fig. 5. Megaplera versabilis Cope; from California coast ; drawn to a 

 scale of -25 inch to a foot. This and all the remaining cuts re- 

 duced to two-thirds of the proportions given. 



Fig. 6. Megaptera versabilis, from below. 



Fig. 7.. Rhachianectes g 1 a u c u s ; from the Californian coast ; scale -25 inch 

 . to a foot. 



Fig. 8. Rhachianectes g 1 a u c u s Cope, from below. 



Fig. 9. Bala^noptera v e 1 i f e r a Cope, approximate proportions; from coast 

 of California. 



Fig. 10. Balsnoptera velifera, approximate proportions; from Queen 

 *■, Charlotte Sound, February, 1865. 



Fig. 11. Sibbaldius sulfureus Cope, approximate proportions; from Cali- 

 fornia coast. 



Fig. 12. Globiocephalus scamraonii Cope; coast of California; about -5 

 inch to the foot. 



Fig. 13. Same, from below. 



Fig. 14. "Bottle-nose Grampus ;" California coast ; scale near -5 inch to the 

 foot. 



Fig. 15. Orca rectipinua Cope, male; approximate proportions; Cali- 

 fornia coast. 



Fig. 16. Orca rectipinua Cope, female; same scale and locality. 



Fig. 17. Orca ater Cope; Juan de Fuca Straits, 1868. 



Plate I. Hyperaodon from the shore of Narragansett Bay, near Tiverton, Rhode 

 Island ; from photographs obtained by Samuel Powell, formerly 

 Secretary of the Academy, at Newport, Rhode Island. 



