NO. 12W. ILL USTRA TIONS OF AMERICAN SHELLS— BALL. 511 
PANDORA (KENNERLEYIA) BUSHIANA Ball. 
Plate XXXI, fig. 3. 
Pandora {Kennerleyia) bushiana Dall, Rep. Blake Pelec,., Bull. Mus. Comp. 
Zool., XII, 1886, No. 6, p. 312. 
Tampa, Florida, in 6 fathoms, Charles T. Simpson. U. S. N. M. , 61029. 
The shell is white externally and very perlaceous within. 
PANDORA (CLIDIOPHORA) TRILINEATA Say. 
Plate XXXI, fig. 4. 
PandorairilineataSAY, Journ. Acad. Nat. Sci. Phila., II, p. 261; Am. Conch. 1830, 
Pt. 1, pi. II. 
Great Egg Harbor, New Jerse}' , and south to the Gulf of Mexico, 
Say; Cape Hatteras to West Florida, Dall. U.S.N.M., 61028. 
The figured specimen is from Tampa Bay, Florida, in 6 fathoms. 
The species has been generally confounded b}- the northern collectors 
with the following one. The shell is white, often with a ferruginous 
deposit near the hinge line, and, like the other species of the genus, 
brilliantly nacreous internally. 
PANDORA (CLIDIOPHORA) GOULDIANA Dall. 
Plate XXXII, fig. 7. 
Pandora (Clidiophora) gouldiana Dall, Rep. Blake Pelec, Bull. Mus. Comp. 
Zool., XII, 1886, No. 6, p. 312 (footnote). 
Nova Scotia south to Virginia, in shoal water to 30 fathoms. 
U.S.N.M., 95490, from Woods Hole, Massachusetts, Dall. 
This large and rude species has generally been confounded by New 
England collectors with the more delicate and elegant Southern shell. 
WEST AMERICA MARINE SPECIES. 
CEPHALOPODA. 
ARGONAUTA EXPANSA Dall. 
Plate XXXIII, figs. 1, 2, 3. 
Argonauia expansaT)A.i.ij, Proc. Cal. Acad. Sci., IV, Dec, 1872, p. 303. 
Gulf of California, various collectors. U.S.N.M., 61369. 
This fine and very distinct species of argonaut has a finely granular 
surface, with a generally yellowish white coloration, dark burnt l^rown 
color on the spines and part of the spire, and a livid brown-purple 
suffusion on the two long axial expansions. It appears to be abun- 
dant in the Gulf, and I have never seen a specimen from any other 
region. It has never been figured hitherto, and while a colored plate 
is required to fully exhibit its distinctive characters, I have thought 
that the figures now provided might aid in its recognition. 
