66 BALiENOPTBEIDJE. 



5. Sibbaldius tectirostris. 



Sibbaldius tectirostris, Cope, Proc. Acad. Nat. Sci. PhUad. 1869, p. 7. 

 Inhab. North Pacific. Skeleton, Mus. Philad. 



6. Sibbaldius tuberosns. 



■Sibbaldiijs tuberosus, Cope, Pi-oc. Acad. Nat. iSci. Philad. 1867, p. 

 Sibbaldius latioeps, Cope, I. c. 1866, p. 297. 



Inhab. North-east coast of America. 



Family 5. BALJENOPTEE,ID.ffl. Pike Whales. 



BaliEnopterina, Oray, I. c. p. 114. 



Balsenoptera, Gray, I. c. p. 114 ; Lil0eborg, Nova Acta Upsal. vi. 



BalsenopteridsB, Oray, l^nops. Whales ^ boJph. p. 3. 



Dorsal fin high, erect, compressed, about two-thirds of the entire 

 length from the nose. Pectoral fin moderate, with four short 

 fingers. VertebraB 50; cervical vertebrae sometimes anchylosed. 

 Neural canal broad, trigonal. Eibs 11 . 11. The second cervical 

 vertebra with a broad lateral expansion, perforated at the base. 

 First rib single-headed. Lower jaw with a conical coronoid process. 



1. BALiENOFTERA. 



Balsenoptera, Oray, I. c. pp. 114, 186 ; Synops. Whales 8f Dolph. p. 3. 

 Fabricia, Oray, I. o. p. 382. 



The lower lateral processes of the third to the seventh cervical ver- 

 tebrae with an angular projectionfin the lower edges. Fingers short, 

 the length of the forearm-bone. 



Scapula broad ; acromion and coracoid elongate, slender. 



1. Balsenoptera rostrata. B.M. 



Balsenoptera rostrata, Oray, I. c. p. 188, figs. 49-63 ; Synops. Whales 

 4- Bolph. p. 3, t. 1. f. 6 (baleen), t. 2 (skull), t. 32. f. 3,4 (cervical 

 vertebrse) ; Van JBeneden, Osteogr. C4t. t. 12 & t. 13. figs. 1-10. 



Inhab. North Sea. 



2. Balsenoptera velifera. 



Balsenoptera velifera, Cope, Proc. Acad. Nat. Sci. Philad. 1869, p. 18, 

 f. 9, 10. 



Dorsal fin large. 



Inhab. Oregon (Finnor Whale) ; California, Queen Charlotte's 



Souud. 



