1. TEACH YPTEEUS, 305 



are no other rudimentaiy rays below it. Lateral line armed, and 

 running as in T. iienia, but terminating- in a series of about five 

 imbricate spines on the loAver part of the extremitj- of the tail. The 

 edge of the belly without any tubercles or papiilaj. The vent is 

 situated before the middle of the total length. Silvery: a very 

 distinct black spot at the commencement of the second fifth of the 

 total length ; there is a second, very indistinct spot, wliich, if pre- 

 sent at aU, appeal's to be situated after the commencement of the 

 second fifth of the length. 

 Mediterranean. 



A specimen from the Mediterranean, fifty-one inches long, and 

 comparatively in a good state of preservation, has been presented to 

 the British Museum by Dr. E. RiippeU as Bogmcerus aristoteUs, Risso. 

 The dorsal crest and the pectoral and ventral fins are mutilated, as is 

 usual in those fishes. The following are the measui-ements : — 



inches. 



Total length (without caudal fin) 51 



Caudal fin 5^ 



Height of the body 6 



Length of one of the middle dorsal rays 2| 



Distance of the snout from the vent 24 



Distance of the snout from the anterior dorsal 



spot 10 



Distance of the snout from the posterior dorsal 



spot' 22 



9. Trachypterus arcticus. 



The Deal-fish. 



Vogmeri or Vaagmar, 0/cifs. Islevnd. Reise, § 684. tab. 43. 



GjTiiaogaster arcticus, Brimn. Ni/e Saml. Datisk. Vidensk. Sekk. Skr. 



iii. p. 408. tab. B. figs. 1-3 ; Faber, Fische Isl. p. 66 ; Niks. Prodr. 



p. 107 ; Walh. Artedi, iii. pi. 3 (cop. from Brihmich). 

 Bogmarus islandicus, Bl. Schn. p. 518. tab. 101. 

 Gvnmetrus arcticus, Cuv. Reqne Aiiim. ; Fle?n. Mag. Nat. Hist. iv. 



*p. 215. fig. 34 ; Jemjtis, Brit. Vert. p. 372. 

 Trachvpterus bogmarus, Cue. 8f Val. x. p. 346 ; Yarr. Brit. Fishes, 1st 



edit. i. p. 191, 2nd edit. i. p. 210, 3rd edit. ii. p. 282 ; Barker, Proc. 



Zool. Soc. 1851, pp. 116, 119; Gaimard,Voi/. Isl. etGronl. Zool.Poiss. 



pi. 12. 

 vogmarus, Reinh. Vidensk. Selsk. Skr. vii. D. p. 71, cum fig. ; 



Liljeborq, Ofvers. af Vet. Akad. Fork. 1849, p. 33 ; Duquid in Proc. 



Zool. Soc. 1851, p." 116. 

 Vogmarus islandicus, Reid, Ann. &■ Mag. Nat. Hist. iii. 1849, p. 456. 



pi. 16. 

 Trachypterus arcticus, Nilss, Skand. Faun. Fisk. p. 162. 



B. 6. D. 172 (160 miss.). A. 0. C. 8/? P. 10-11. V. 6. 



The greatest depth of the body is at its middle, and contained five 

 times and a half in the total length ; dorsal rays smooth ; lateral 

 line spmy ; a series of two blackish blotches on the side of the body. 



Seas of Iceland, of the Orkneys (Sanda), and of northern Norway. 



VOL. III. X 



