THE NAUTILUS. ut 
blunt, always more or less eroded; there are about four whorls 
in the adult with indications of about five resting stages; the 
surface is smooth except for inconspicuous lines of growth; the 
young are somewhat naticoid, with a small umbilicus, but this 
shape rapidly changes; the whorls enlarge rapidly, being as it 
were appressed toward the suture which is distinct but not 
channeled, while the umbilicus becomes relatively larger and 
more or less funicular; the aperture is egg-ovate, entire, the 
posterior commissure solidly filled with callus, the outer lip 
internally thickened, patulous not reflected; the inner thickened, 
continuous over the body; height of shell 33; of last whorl 31; 
of aperture 23; maximum diameter (in front of the middle of 
the whorl) 26mm. U.S. Nat. Mus. Cat. No. 332780. 
Habitat. Rio Uruguay, Department of Paysandu. 
The operculum is horny, concentric, with the nucleus at the 
inner third; the radula is typically Ampullarioid and might be 
quite accurately represented by Troschel’s figure of the radula 
of A. urceus, in the ‘‘Gebiss der Schnecken.’’ 
The literature has been carefully searched, both on the lines 
of Ampullaria and Campeloma, but nothing of the sort has been 
discovered. 
The subgenus is named in honor of Doctor Florentino Felip- 
pone, whose energy and interest in exploring the fauna of 
Uruguay are deserving of great praise. 
The peculiar form of this species, and its funicular umbilicus, 
so different from that of any other in the genus, seem to authorize 
its separation. 
A NEW SPECIES OF PHYSA FROM NEW YORK STATE. 
BY FRANK C, BAKER. 
PHYSA ONEIDA n. sp. Shell of medium size, ovate, slightly 
inflated; whorls about five, slowly increasing in diameter; spire 
short, broad, the whorls flattened; color yellowish-horn; surface 
smooth and shining, with rarely a trace of spiral striae, but the 
