212 Proceedings of the Royal Physical Society. 



Opisthoteuthis, Yerrill, 1883. 

 1. 0. Agassizii, VIL, "Blake" Suppl., p. 113, pi. i., fig. 1 ; pi. ii., 

 fig. 1, 1883. 

 Atlantic Ocean ; New England and West Indian Regions. 



Division 2. Trachyglossa, LUtken/ 1882. 



Family II. Amphitretid^, Hoyle, 1886. 

 Amphitretus, Hoyle, 1885. 

 1. A. pelagicus, Hoyle, Diagnoses I., p. 235, 1885; Cliall. Ceph., 

 p. 67, pi. ix., figs. 7-9, 1886. 

 Pacific Ocean. 



Family III. Argonautid^, Cantraine, 1841. 

 Argonaut a, Linne,^ 1756. 



Ocyt/we, Leach et Auctt. {non Eafinesque). 



1. A. argo, Linn., Syst. Nat., ed. x., p. 708, 1758. 



1817. Argonauta haustrum, Dilhvyn, Descr. Catal., p. 335. 



1838. ,, argo, d'Oib., Ceph. acet. ; Argoiiaute, pi. ii., figs. 1, 2. 



1853. ,, Gruneri, Dkr., Zeitschr. f. Malak., 1852, p. 48. 



1861. ,, „ Ev., Conch. Icon., pi. iii., fig. 26. 



1861. ,, argo, Rv., Conch. Icon., pL iii., fig. 2c. 



1861. ,, haustrum, E,v., Conch. Icon., pi. ii. 



1886. ,, argo, Hoyle, Chall. Ceph., p. 69. 



Atlantic and Pacific Oceans ; New England, Lnsitanian, 

 Mediterranean, South African, Indo-Malayan, and Aus- 

 tralian Regions. 



2. A. tuberculata, Shaw. 



. Argonauta tuberculatus, Shaw, Nat. Miscell., xxiii., pi. 995.^ 



1786. ,, 7iodosa, Solander, Forth Catal., 76, 2120 (vol. ii., 



p. 113). 

 1786. ,, navicula, Solander, Portl. Catal., 42, 1055 (vol. ii., 



p. 112). 



^ Op. cit., p. 543. As I did not feel justified in removing the buccal organs 

 from the small solitary specimen of Amphitretus pelagicus, I am unable to 

 say whether it belongs to the Trachyglossa or the Lioglossa. 



^ Having had no opportunity of forming an independent opinion as to the 

 values of the various recorded species of Argonaut, I have followed von 

 Martens {Ami. and Mag. Nat. Hist., ser. 3, vol. xx., p. 103, 1867), and 

 added such other species as have been described since the publication of that 

 paper. 



^ I have been unable to ascertain beyond doubt when this was published, 

 for the volume bears no date. Dillwyn {op. cit., p. xi.) gives 1790 ; if this 

 be correct, one of Solander's names should take precedence. 



