134 THE NAUTILUS. 
On some specimens of P. clappi the elevated lamelle are in part 
subobsolete. 
Dentition not yet examined, so that the species may turn out to 
be a Planogyra rather than a Punctum. 
Punctum californicum n. sp. 
Similar to P. conspectum in the small, deep umbilicus and color. 
Spire somewhat more elevated; whorls fully 4, closely revolving, 
the last decidedly narrower than in conspectum (viewed from above). 
Surface lusterless, with fine, even, hair-like striation, and in places 
showing faint traces of spiral strie. Umbilicus narrow and deep, 
its width contained 44 times in greatest diameter of the shell. Aper- 
ture wider than high, shaped much as in P. conspectum. 
Alt. 1:14, greatest diam. 1°85 mm. 
Fish Camp, Fresno Co., California. 
Gastrodonta (Taxeodonta) lamellidens n. sp. 
Shell similar to G. multidentata, but larger, with an additional 
whorl, and instead of radial rows of teeth having partition-like 
radial barriers, generally three in the young, one, not far within, in 
the adult shell. Alt. 1°6, diam. 3°7 mm. 
Thunderhead, Great Smoky Mts. 
This is one of Mr. J. H. Ferriss’ finds.. It was only obtained in 
small numbers, but probably is abundant, overlooked on account 
of the small size. I have not heard of G. multidentata being found 
so far south as this. . 
Gastrodonta collisella percallosa n. var. 
Shell similar to G. collisella or a small ligera with globose base ; 
having an extremely heavy callus within the outer and basal walls 
of the aperture, extending about one-third whorl inward ; no lamella. 
Whorls 74. Size of G. collisella. 
Mr. Geo. H. Clapp, of Pittsburgh, Pa., when in Philadelphia 
lately, called my attention to this form. Upon examining the col- 
lection of the Academy, two trays of it were found, one set collected 
by A. G. Wetherby (who also supplied Mr. Clapp’s specimens), on 
the Tennessee river, 3 miles above Chattanooga, Hamilton Co., the 
other by G, A. Lathrop, at Nashville, Tenn. In correspondence 
with Mr. Wetherby some years ago, we mutually agreed that the 
shells were a small, heavily calloused variety of G. ligera; but upon 
reconsideration I am disposed to rank them rather with G. collisella. 
