330 zipniicii:. 



observes they differ greatly in size (Cetac. 226). It cannot be the 

 young Narwhal, for the l)ack is finned. 



Professor Eschricht regards the Anarnak or Monodon spurius, 

 0. Fab., on which Lacepede formed the genus Anarnacus (Cetac. 

 164), as the common Hijperoodon, in which Fabricius mistook the 

 lower for the upper jaw. The fat of Hyperoodon is purgative, which 

 Fabricius describes to be a peculiarity of the Anarnac. 



Lacepede (Cetac. 164) described it as a genus under the name of 

 Anarimmis, and lUiger (Prodi'. 142) under that of Ancylodon ; and 

 in the ' Zoology of the Erebus and Terror,' on the strength of Fa- 

 bricius's usual accuracy, I adopted the views of this naturalist ; but 

 Professor Eschricht's observations have induced me to believe that 

 Cuvier and other naturalists were right in considering it a synonym 

 of Hiip)eroodon. 



The error of Fabricius is very pardonable, as Desmarest and Lesson 

 have mistaken the upper for the lower jaw in Chemnitz's description 

 (Desm. Mamm. 520 ; Lesson, Mamm. 427 ; Cetac. 120) ; and M. F. 

 Cuvier has not well understood it, as pointed out by M. Wesmael (Z. c.) ; 

 and lUiger makes the same mistake with regard to his species. 



Physeter hidens (Sowerby) has been referred to this genus ; but the 

 form of the head and position of the fins, the teeth, and the form of 

 the skull show it to be a ZipMus. 



Hyperoodon Butzkopf. The Bottlehead. 

 Black, beneath lead -coloured. 



1. Bottlehead, or Flounder's Head, Bale, Hist. Jlunvich, 411. t. 149 



(male 18, female 13 feet long), cop., 1730. 

 Beaked Whale, Penn. Brit. Zuol. t., 1769. 

 Delphinus Butzkopf, Bonnat. 25 ; Desm. N. Diet. ix. 176, 1789. 



2. Hyperoodon Butzkopf, Lacep. Cetac. 319, from Baiissard, Juurn. P/tys. 



xxxiv. 201. t. ; copied, F. Cnv. Cetac. 241. 1. 17. f. 1, 1. 11. f. 1 ; cop., 



Gray, Zool. Erehus S,~ Terror, 20. t. 3. f. 1, 2 (animal), f. 4, 5 (skull) ; 



Cat. Cetac. B. M. 1850, 61 ; P. Z. S. 1860, 424. 

 ■ Delphinus ? edentulus, Schreh. Siiugeth. t. 347, 1802. 

 Nodus edentulus, Wayler, N. S. Amph. 34. 

 Delphinus bidens, Turton, B. Fauna, YI . 



D. Hyperoodon, Dcsvi. Mamm.b2\ ; Thompson ; Fischer, Syn. 515, 1822. 

 Heterodon Hyperoodon, Lesson, Man. 419, 1827. 

 Hyperoodon Baussardi, F. Cuvier; Duvernoy, Ann. Sci. Nat. xv. 1851. 

 D. Honfloriensis, Desm. 

 ?3. Monodon spurius (Ananiak), O. Fair. Faun. Groenl. 31 j Bonnat. 



Cetol. 11 ; hence 

 Delphinus anarnacus, Desm. Mamm. 520. 

 D. ? spurius, Fischer, Syn. 515. 

 Anaruakus Groenlandicus, Lacep. Cet. 164. 

 Ancylodon spurius, Illiger, Prodr. 142. 

 Heterodon anarnacum. Lesson, Man. 418. 



4. Hj^eroodon, Longchamps, Mem. Soc. Linn. Norm. vii. 19. t. 1. 



5. Bal.iena rostrata, Chemnitz, Berlin Besch. iv. 183, 1778; hence 

 Delphinus Chemnitzianus, Blainv. in Desm. N. Diet. ix. 175, 1822. 

 Heterodon Chemnitzianum, Lesson, Man. 418, 1827. 



