188 BALiENOPTBEIDiE. 



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

 9 inches long, an older foetus 6^ feet long, and an older specimen 

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

 rapidly the rostrum elongates in comparison with the size of the 

 hrain-case, the very unequal manner in which the hones 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. — Eschr'ie'ht, WalWiiere, t. 7. f. d, D. 



1. Balaenoptera rostrata. The Pike Whale. 



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

 above. 



Balssna rostrata, Miiller, Prodr. ; O. Fabr. Faun. Grcml. 40 ; Hunter, 



Phil. Tram. Ixxvii. t. 20-23, cop. F. ilf. t. 4 ; Turtofi, B. Fauna, 16 ; 



Nilsson, Scand. Fauna, 632. 

 Rorqualus rostratus, Dehay, Zool, New York Mus. 730. t. 30. f. 1. 

 Balsena muaculus (pars), Fkm. B. A. 30 ; Jenyns, Man. 47. 

 Balaena Boops (pars), Mem. B. A. 31. 

 Balsenoptera acuto-rostrata, Lacep. C4tac. ; Scoresby, Arct. Peg. i. 485. 



1. 13. f. 2. 

 Balcenoptera acuto-rostrata, Lesson, N. T. P. A. 202. 

 Balaenoptera microcephala, Brandt, MSS. 

 Balsena minimus borealis, Enox, Cat. Whale, 14. 

 Rorqualus minor, Knox, Jardine, Nat. Lib. l42. t. 7 ; Gaimard, Voy. 



lAande, Mamm. 1. 13 (skull), t. 14 (skull). 

 Balsena borealis rostrata, Fischer, Syn. s. 25. 

 Balsena Boops, Alters, Icon. Anat. 1822, t. 1 ; Camper, Cetao. 74. 1. 11, 



12 ; Cat. CoU. Surg. 171. n. 1194, Hunter's spec. ? ; Oiesecke, Edinb. 



Fncyclop. 

 Balsenoptera Boops, Fin-backed Whale, Newman, Zoologist, i. 33, flg. ; 



Fleming, B. A. 31 ; Bell, Brit. Quad. 520. flg. p. 521, from Hunter. 

 Rorqualus Boops, F. Cuv. Cetac. 321. t. 20. 

 Balsenoptera Physalus, Gray, Zool. F. 8r T. 18. 

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



(foetus and anat.). 

 Balsenoptera rostrata. Gray, Zool. Ereb. ^ Terror, 50. t. 2 (skull), 



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



1850, 32; Proc. Zool. iSoc. 1864, 227 ; Flowm; Proc. Zool. Soc. 1864 



(anat.). 

 Pterobalsena minor, Eschrioht,Nard. Wallthiere, 59, 1849 ; Van Beneden, 



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



Penzance, 1851 ; lAl^eborg, I. c. ; Malmgren, Arch. Naturg. 1864. 

 Pterobalsena minor et prostrata, Van Beneden, I. c. 463. 



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

 B&y (JDelcay). Valognes, France (ffeojfroy). Greenland. Norway. 



