228 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY, 
the rule in Mediterranean specimens, the angles being more vertically extended 
than in most of the other species. 
B. 4. A.argo var. americana Dall, Bull. 37, U. S. Nat. Mus., 1889, p. 174, pl. 67, 
figs. 1-9. East coast of the United States south of Cape Cod, and the West 
Indies. 
This form is small, broad-backed, and strongly auriculate. 
B. 5. A. pacifica Dall, Amer. Nat., 1869, 3, p. 237; Amer. Journ. Conch., Nov., 
1871, 7, p. 95. 
This is more compressed than the americana and. with pronounced auricles. Its 
range extends from Monterey, California, south to the Galapagos Islands. 
C. A. bulleri Kirk, Trans. N. Zealand Inst., May, 1886, n. s., 1 (18), p. 138, pl. 4. 
New Zealand. 
This form has a wide auriculate aperture, and its sides slope rapidly to a narrow, 
deeply channelled keel with particularly sharp compressed tubercles. "This results 
in a wedge-shaped form, apparently unique in the group. 
D. 1. A. nouryi Lorois ; see page 224 for synonymy and remarks. 
E.1. A. dispar Conrad, Journ. Acad, Nat. Sci. Phila., 1854, n. s., 2, p. 832, pl. 34, 
figs. 3, 8a. Locality unknown. 
This form, by its simple aperture and partly tuberculate dorsal channel, recalls 
A, nouryi, which is however smaller, less compressed, and differently sculptured, 
If A. cornuta has an inauriculate form, this species might represent it, judging 
by the figures given by Conrad. 
E.2. A, cornuta Conrad; see page 224 for synonymy and remarks. 
F.2. A. nodosa Solander, Portland Cat. 1786, p. 96, no. 2120, based on the form 
without auricles figured by Rumphius, Amboin. Rariteitk., pl. 18, fig. 1; 
+ A. oryzata Meuschen (ex parte), Mus. Gev., 1787, p. 252; + A. tuberculata 
Bolten, Mus. Bolt., 1798, p. 71; + A. rotunda Perry, Conch., 1811, pl. 42, 
fig. 2; + A. tuberculatus Shaw, Nat. Misc,, 1811, 23, pl. 995; + 4. gracilis 
Kirk, Trans. N. Zeal. Inst., 1885, 17, p. 58, pl. 13, upper figs. Brazil; Cape 
of Good Hope, New Zealand, Indo Pacific. 
Meuschen’s species oryzata was a compound of Argonauta and Carinaria and 
his nomenclature not Linnean, 
F.1. A. bibula Bolten, Mus. Bolt., 1798, p. 71, after Martini, Conch. Cat., 1769, 1, 
pl. 18, fig. 160 = Nautilus papyraceus auritus of Favanne, 1756, pl. 7, fig. 
A.7; + A, tuberculosa Lamarck, An. s. Vert., 1822, 7, p. 652; + 4. tuberculata 
Kirk, Trans. N. Zeal, Inst., 1885, 17, p. 58, pl. 13, lower figures ; + A. nodosa 
‚forma aurita Martens, Ann. Mag. N. Hist., 1867, 3d ser., 20, p. 104. 
