THE NAUTILUS. 45 
F. crocata Philippi, Zeitschr. f. Malak. p. 25, 1848: Abbild. 
Besch. Conch. III, (Fasciolaria) Tab. I, f. 3, 1849. 
F. reevei Jonas, in Philippi, Abbild. Besch. Conch. III, (Fasci- 
olaria) Tab. III, f. 2, 1850. 
Even this large shell is not free from a nomenclatorial tangle. 
F. papillosa Sowb., as pointed out by Tyron, seems to be the 
oldest name. I have not access to the Tankerville Catalogue, 
but if the young specimen as figured by Reeve (fig. la, b) and 
copied by Tryon (fig. 15) is the type, then this name seems 
somewhat doubtful. The spire and canal are both too long for 
a specimen of that size, in fact I cannot see any difference in 
figs. la and 1b, and the figure of F. coronata Lam. as figured 
by Reeve (pl. VI, f. 14a, b.) Figure 1c and d of Reeve and 
copied by Tryon (fig. 16) is F. gigantea. . The F. crocata Phil. 
from Yucatan is undoubtedly the young of this species and not 
related to F. filamentosa as suggested by Tryon. 
In regard to its size, Tryon says: ‘‘ Length 1 to 2 feet. This 
is the largest known species of univalve shell.’’ Charles 
T. Simpson (Davenport Acad. Nat. Sci., v, 51, 1886), says: 
‘On the Keys I have seen dead shells two feet in length, the 
largest Gastropod in the world.’’ In THe Naovritus, XIX, 108, 
I had occasion to review Mr. Charles Hedley’s paper, ‘‘On a 
large example of Megalatractus aruanus (L.), and incidentally 
mentioned that this Australian giant had a rival on our Florida 
coast, F. gigantea, quoting one of the above references. Mr. 
Hedley replied in a letter saying: ‘‘ Give it in inches, I do not 
like the sound of the word feet.’’ I remember a specimen 23 
inches (about 575 mm.) in length, and there was a very large 
specimen in the collection of the late Joseph Wilcox which I 
cannot now locate. In writing to Dr. Dall, he says: ‘‘The 
largest specimen we have of F. gigantea measures 20 inches in 
length, with probably half an inch lost from the tip of the spire 
and as much more from the end of the canal; I have seen a 
bigger one but I do not remember the exact length of it. Call 
ours 530 mm. and it would, I think, be fair.’? The largest in 
the American Museum of Natural History is 20.25 inches and 
that in the Academy of Natural Sciences about the same. 
