8 LAND AND FRESII-WATER SHELLS OF N. A. [PART II. 



family inhabiting the interior, but though found over a wide ex- 

 tent of country, it still possesses a fondness for the sea in com- 

 mon with the other species of the family. Around Boston it 

 is found at or below the surface in swamps, growing among 

 mosses. 



This minute shell is well known in American cabinets as a 

 Pupa. Say described it as such in 1822, though he mentions 

 the probability of its being a Carychium. It has been described 

 since that time as a Pupa by Gould, DeKay, and Adams, and 

 catalogued among the species of the same genus by all the Ame- 

 rican writers who have mentioned it, until 1851, when its correct 

 position was pointed out by Stimpson (Shells of New England) 

 and Gould (Terr. Moll. II). The former places it in his family 

 of Melampidae. 



Dr. Binney, in 1843 (Boston Journal, p. lOG), considers it a 

 Pupa. In the Terrestrial Mollusks he places it under Bulimus. 



In 1852, Jay removed it from Pupa to Carychium (Cat. p. 

 263). 



Notwithstanding its distinct generic peculiarities having been 

 pointed out in 1851, we find the shell considered as a Pupa in 

 several American catalogues as late even as 1857 (vide Boston 

 Troc. YI, 128). 



In Europe we find its true position pointed out by Pfeiffer as 

 early as 1841, and by all subsequent writers. 



In the fourth volume of the Terrestrial Mollusks I have given 

 copies of the original descriptions of this species, and a figure of 

 C. exile. 



Lingual dentition (see p. 6). 



r-.n. No. 

 S440 



Xo.ofSp. 



Locality. 



From whom received. 



Remarks. 



Spurious Species. 



Carychium armicjera, contracta, and rupicola, of SA-i, and C. corticaria, 

 of Fekcssac (Tabl. Syst.), are species of Pupa. 



