104 Till! NAUTILUS. 



This shell is more closely related to U. borealis A. F. Gray than 

 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. lideohts Lam., 

 but differs entirely in the teeth, growth lines, epidermis, outline of 

 shell, and cavity of beaks and shell, from any variety of Inteolus 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 lcS84, in the mountains near Ht'-as, 

 Pyrenees, a dextral example of the usually sinistral Buliminus 

 quadridens Miiller. 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 Helieirfte, and, besides the 

 well-know reversed Campeloma decision Say (=var. heterostropha), 

 still rarer in fiuvatile shells. 



Helix (Xerophila) trepidula Servain (Dept. du Bouches-du-Rhone, 

 S. France). 



Helix (Xerophila) oreta Bourg. Oued-el-Hakoum, south of Ber- 

 rouaghia (Algeria). 



Helix (Euparypha) /ilxnnrt. Miill. South France. 



Helix (Taclieri) nemoralis L. Bundoran, Ireland (from Mr. 

 Brockton Tomlin). 



Helix (Miii-ii/iii-Iii} rir in ieulnta Miill. Marseilles, France (in Mr. 

 M. Sollier's collection). 



