CIONELLA. 225 



Bulimus lubricoides, Stimpson, Sh. of N. E. 54. 



Bulimus auhcylindricus, Moquin-Tandon, Moll. Fr. II, 304, pi. xsii, f. 



15-19. 

 Zua lubricoidea, Morse, Journ. Portl. Soc. I, 30, f. 79, 81, 84 ; pi. x, f. 82 



(1864) ; Amer. Nat. I, 607, f. 49 (1868). 



From Canada to the Red River of the North, and English 

 River. In Nebraska. In New England and the States border- 

 ing the great lakes. 



Animal : Head, back, and eye-peduncles blue black, foot paler, 

 shorter than the shell ; tentacles short. 



This little species, which is hardly larger than a grain of wheat, 

 is certainly identical with the European shell. It is distributed 

 over a vast expanse of country, and exists in immense numbers 

 in certain favorable localities. Its usual place of abode is under 

 leaves and the bark of decaying trees, in forests and groves. Its 

 surface has a peculiarly brilliant reflection, which excels that of 

 any other of our shells ; and hence it has been known in France 

 as "la brillante." There is a slight sinuosity at the union of the 

 peristome with the columella, rendering the aperture a little effuse 

 at this point, and approximating the shell to the genus Achatina. 

 This, and its other departures from the typical Bulimuli, have 

 caused it, in several instances, to receive a generic distinction. 

 Dr. Leach first indicated it as a separate genus, under the name 

 Zua. 



This is one of the circurapolar species common to Europe, Asia, 

 and America. On this continent it is not found farther south 

 than the Middle States. In Europe it is found in Spain, Italy, 

 and Illyria, as well as the extreme northern countries. Pfeiffer 

 also quotes it from Madeira. 



Its identity with the species of the old world has been doubted, 

 and the specific name lubricoides applied to it.* I have no doubt 

 of its being the same species, being unable to detect any differ- 

 ences between American and foreign individuals. In criticizing 

 the plates of the Terrestrial Mollusks, Dr. Pfeiffer notices con- 

 siderable difference between the figure there given and the 

 European shells (Mai. Blatt. 1858, 28). 



Moquin-Tandon (II, 305) describes the jaw as low, slightly 

 arched, light horn-colored, extremities attenuated, somewhat 



' This is preocoupied. 

 1 5 January, 1869. 



