12 O. NORDGÅRD > [1922 



of the North Atlantic it is probable the same species, A. dux, which 

 has been recorded. On the American side the species of Architeu- 

 thus have got other names (see W. E. Hoyle, 1886, p. 35). An Archi- 

 teuihus sp. is recorded from the Azores by L.Joubin, (1900, p. 46). 

 The hig mandibles^ of such a one were tåken in the stomach of a 

 cachalot (Phy seter macrocephalus Lin.). The sperm whale is 

 known as a typical teuthophag (see Collett, 1911 — 1912, p. 634 

 — 635), and the whale has often cirkular marks on the skin from 

 struggle with Architeuthus (Murray and Hjort, 1912, p. 635, fig. 

 486). These marks are caused by the dentale homy ring of the 

 suckers. In the specimen of A. dux from Hellandsjø {"/s 1916) I 

 found the diameter of the greater horny rings to be ca. 20 mm. The 

 circular marks in Murray and Hjort's fig. 486 have about the 

 same diameter. Further facts about the marks on the skin of some 

 whales are given by Ad. S. Jensen (1915, 1916). 



Ommatostrephes sagittatus Lamarck. 



Ommatostrephcs todanis G. O. Sårs, 1878, p, 334, pl. 30. 

 Todarodes sagittatus Lønneberg, 1891, p. 33. 

 Ommatostrephes sagittatus Massy, 1909, p. 32. 



In the Trondhjem Museum there are 2 specimens of this species. 

 Both are certainly from the Trondhjem region. The one which is 

 labelled Trondhjeim 1869 has a mantle length of 41 cm. 



Distribution. — Northern Norwa}^ to the Mediterranean and 

 the Azores. Biological details of this species are given by G. O. Sårs, 

 (1878, p. 334), Lo Bianco (1899, p. 532) and Johan Hjort in 

 Murray and Hjort's excellent book (1912, p. 648). 



The strange name of Ommatostrephes is explained as «eyeturner» 

 (See R. A. Philipi, Handbuch der Conchyliologie und Malaco- 

 zoologie, p. 99. Halle, 1853). 



LIST OF PAPERS. 



O. Abel, Paleobiologie der Cephalopoden aus der Gruppe der Di- 



branchiaten. Jena, 1916. 

 A. Appelløf, Teutologische Beitrage. Bemerkungen iiberdie auf 



der norwegischen Nordmeer-Expedition gesammelten 



Cephalopoden. Bergens Museums Aarbok 1892, Nr. 1. 

 E. Becher, Mollusken von Jan Maj^en. Die Osterreichische Polar- 



station Jan Mayen 1882 — 1883. Beobachtungs-Ergebnisse, 



Bd. 3. 



1 See Joubin, 1900, pl. 14, figs. 1, 2. 



