104 THE NAUTILUS. 
This shell is more closely related to U. borealis A. F. Gray thar 
any other I know of; it is not so much inflated as that species, it is 
more transverse on both dorsal and ventral portions; when the rays 
are present they differ entirely ; the posterior portion of the shell is 
flatter, it is more oblique in outline, the cardinal teeth are much 
smoother and more compressed, the cicatrices are deeper and more 
rounded, shell cavity shallower, the lines of growth are very much 
more numerous and closer. 
It bears some resemblance to some varieties of U. luteolus Lam., 
but differs entirely in the teeth, growth lines, epidermis, outline of 
shell, and cavity of beaks and shell, from any variety of luteolus I 
ever saw. 
Several years ago, Mr. James H. Ferris, of Joliet, collected a 
number of these shells at the locality given, and I was never satis- 
fied that they could be placed, even as a marked variety, with any 
described species. 
ON SOME SINISTRAL LAND SHELLS. 
BY C. F. ANCEY. 
The following are several sinistral specimens of normally dextral 
species, nearly all included in my own collection. Some of these 
monstrosities are still, I think, unrecorded. In addition to these, I 
must say that I have collected, in 1884, in the mountains near Héas, 
Pyrenees, a dextral example of the usually sinistral Buliminus 
quadridens Miller. This is also in my collection. From the list 
given below, it appears that sinistral monstrosities are much more 
scarce in operculate land shells than in Helicide, and, besides the 
well-know reversed Campeloma decisum Say (=var. heterostropha), 
still rarer in fluvatile shells. 
Helix (Xerophila) trepidula Servain (Dept. du Bouches-du-Rhéne, 
S. France). 
Helix (Xerophila) oreta Bourg. Oued-el-Hakoum, south of Ber- 
rouaghia (Algeria). 
Helix (Euparypha) pisana Mill. South France. 
Helix (Tachea) nemoralis L. Bundoran, Ireland (from Mr. 
Brockton Tomlin). 
Helix (Macularia) vermiculata Mull. Marseilles, France (in Mr. 
M. Sollier’s collection). 
