224 bulletin: museum of comparative zoology. 



CEPHALOPODA. 



DIBRANCHIATA. 



OCTOPODA. 



Argonautidae. 



ARGONAUTA Lixxe. 



Argonauta Linne, Syst. Nat., 1758, Ed. 10, p. 708 (First species and type A. argo L. 

 Mediterranean) ; Hoyle, Cat. liec. Ceph., 1886, p. 8. 



Argonauta cornuta Conrad. 



Argonauta cornuta Conrad, Journ. Acad. Nat. Sci. Phila., Feb., 1854, 2d ser., 2, 



p. 332, no. 9, pi. 34, fig. 2. 

 Argonauta expansa Dall, Proc. Cal. Acad. Sci., Dec, 1872, 4, p. 303 ; Proc. U. S. 



Nat. Mus., 1902, 24, p. 511, pi. 33, figs. 1, 2, 3. 



Fragments of this species were dredged at stations 3354, 3356, 3360, 3376, 

 and 3392, in the Gulf of Panama east of Cocos Island. The original description 

 gives the habitat as unknown ; the specimens described by me in 1872 were col- 

 lected in the Gulf of California by Fisher. So far as known, the range of the 

 species is confined to the region between Cape St. Lucas and Panama Bay. 



When I described this species, Conrad's paper above referred to was not ac- 

 cessible to me, and, curiously enough, I have found no reference to his descrip- 

 tions or plate in any of the works on Argonauta I iiave been able to consult. His 

 figure is not very characteristic, yet, taken in connection with his description, it 

 seems very probable that the two diagnoses refer to the same species. The speci- 

 mens I have seen are very uniform, the wide auricles invariably present, and the 

 size about the same in all adults, also the granulate surface. 



Argonauta nouryi Lord is. 



Argonauta nouryi Lorois, 1852 (Jan.), Rev. et Mag. Zool., 2me se'r., 4, p. 9, pi. 1, 

 fig. 6 ; Conrad, Journ. Acad. Nat. Sci. Phila., Feb., 1854, 2d ser., 2, p. 333. 



Argonauta grumri Dunker, Zeitschr. Mai., Mar. 26, 1852, p. 43 ; Nov. Conch., Moll., 

 Mar., 1858; p. 29, pi. 9, figs. 1, 2; Reeve, Conch. Icon., 1861, pi. 3, fig. 20. 



Argonauta argo, forma mutica Martens, Ann. Mag. N. II., 1867, 3d ser., 20, p. 104. 



? Argowiutn grnneri Sowerby, Tlies. Conch., 1864, 3, p. 264, pi. 258, fig. 9 (very 

 bad figure). 



Marquesas Ids., Lorois, Dunker ; equatorial Pacific, Conrad; stations 3394 and 

 3431, U. S. S. "Albatross," in the Gulf of Panama, and iu N. Lat. 24°, in the Gulf 



