224 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
CEPHALOPODA. 
DIBRANCHIATA. 
OcTopoDa. 
Argonautidae. 
ARGONAUTA Linne. 
Argonauta Linné, Syst. Nat., 1758, Ed. 10, p. 708 (First species and type A. argo L. 
Mediterranean) ; Hoyle, Cat. Rec. Ceph., 1886, p. 8. 
Argonauta cornuta Conran. 
Argonauta cornuta Conrad, Journ. Acad. Nat. Sci. Phila., Feb., 1854, 2d ser., 2, 
p. 382, no. 9, pl. 34, fig. 2. 
Argonauta expansa Dall, Proc. Cal. Acad. Sci., Dec., 1872, 4, p. 308; Proc. U.S. 
Nat. Mus., 1902, 24, p. 511, pl. 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 have 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 Lorors. 
Argonauta nouryi Lorois, 1852 (Jan.), Rev. et Mag. Zool., 2me sér., 4, p. 9, pl. 1, 
fig. 5; Conrad, Journ. Acad. Nat. Sci. Phila., Feb., 1854, 2d ser., 2, p. 383. 
Argonauta gruneri Dunker, Zeitschr. Mal., Mar. 26, 1852, p.43; Nov. Conch., Moll., 
Mar., 1858; p. 29, pl. 9, figs. 1,2; Reeve, Conch. Icon., 1861, pl. 3, fig. 20. 
Argonauta argo, forma mutica Martens, Ann. Mag. N. H., 1867, 3d ser., 20, p. 104. 
2 Argonauta gruneri Sowerby, Thes. Conch., 1864, 3, p. 264, pl. 258, fig. 9 (very 
bad figure). 
Marquesas Ids., Lorois, Dunker ; equatorial Pacific, Conrad; stations 3394 and 
3431, U.S. 8. “Albatross,” in the Gulf of Panama, and in N. Lat. 24°, in the Gulf 
