188 bal^nopterid.t:. 



Eschricht figured the cranium of a B. rosfmta from a foetus 

 9 inches long, an older foetus G^ feet long, and an older specimen 

 31 feet long (t. 9, t. 10, 1. 11, & t. 14), Avhich show how much more 

 rapidly the rostrum elongates in comparison with the size of the 

 brain-case, the very unequal manner in which the bones enlarge as 

 compared with each other, and how they anchylose, especially the 

 very large size of the tympanic bones in the smallest foetus com- 

 pared "with these bones in the older specimen, and how they enlarge 

 laterally and become more transverse and less oblique as the animal 

 increases in size. In the foetal state the forearm-bones are slender 

 and nearly twice as long as the humerus ; the longest fingers are 

 almost as long as the forearm-bones ; the second and third and the 

 first and fourth fingers are nearly equal in length ; the first finger 

 has three, the second and third six or seven, and the fourth four 

 phalanges. — Eschricht, Wallthiere, t. 7. f. d, D. 



1. Balsenoptera rostrata. The Pike Whale. 

 Black, beneath reddish white. Pectoral fin white near the base 

 above. 



Balasna rostrata, 3Iiiller, Prodi: ; O. Fahr. Fmm. Grccnl. 40 ; Hunter, 



Phil. Trans. Ixxvii. t. 20-23, cop. E. M. t. 4 ; Turtoii, B. launa, 16; 



Nilsson, Scand. Fauna, 632. 

 E-orqualus rostratus, Dekay, Zool. New York Mits. 730. t. 30. f. 1. 

 Baleena musculus (pars), Flem. B. A. 30; Jemjns, Man. 4n. 

 Balasna Boops (pars), Flem. B. A. 31. 

 Balsenoptera acuto-rostrata, Lacep. Cetac. ; Scoresby, Arct. Peg. i. 485. 



1. 13. f. 2. 

 Balojnoptera acuto-rostrata, Lesson, N. T. R. A. 202. 

 Balsenoptera microcephala, Brandt, MS8. 

 Balffina minimus borealis, Knox, Cat. Whale, 14. 

 Korqualus minor, Knox, Jar dine, Nat. Lib. 142. t. 7 ; Gaimard, Voij. 



Islande, Mamm. t. 13 (skull), t. 14 (skull). 

 Balsena borealis rostrata, Fischer, Si/n. s. 25. 

 Balsena Boops, Albers, Icon. Anat. 1822, t. 1 ; Camper, Cetac. 74. t. 11 , 



12 ; Cat. Coll. Surg. 171. n. 1194, Hunter's spec. ? ; Giesecke, Edinb. 



Encyclop. 

 Balsenoptera Boops, Fiu-backcd Whale, Newman, Zoologist, i. 33, fig. ; 



Fleming, B. A. 31 ; Bell, Brit. Quad. 520. tig. p. b'2\,fro7n Hunter. 

 Eorqualu's Boops, F. Cuv. Cetac. -521. t. 20. 

 Balsenoptera Physalus, Grai/, Zool. E. J^~ T. 18. 

 Vaagehval, Eschricht, K. D. Vidensk. Selsk. xi. 1. 1, 2, and p. 286-299 



(fa'tus and anat.). 

 Bal;\3noptera rostrata, Grag, Zool. Ereb. Sf Terror, 50. t. 2 (skull), 



t. 1. f. 3 (baleen) ; Proc. Zool. Soc. 1847, 90 ; Cat. Cetac. B. M. 



1850, 32 ; Proc. Zool. Sue. 1864, 227 ; Floicer, Proc. Zool. Soc. 1864 



(anat.). 

 Pterobalsena minor, Eschricht,Nord. Wallthiere, 59, 1849 ; Van Beneden, 



Mhn. Acad. Roy. Bruxelles, xxxii. 36; Couch, Rep. Nat. Hist. Soc. 



Penzance, 1851 •, Lilljeborg, I. c. ; Malmgren, Arch. Naturg. 1864. 

 Ptcrobakiena minor et prostrata, Van Beiu-den, I. c. 463. 



Tnhab. North Sea. Ascending the mouths of rivers. New York 

 Bay (DeJcaij). Valognes, Franco (Creo^roy). Greenland. Norway. 



