178 AURICULACEA. 



Remarks. The above is Kuster's description. The 

 figure to which I refer is a fac-simile of one of his. This 

 is the only information I have been able to obtain with 

 regard to the species. It has not been described by any 

 other author but Pfeiffer, who merely quotes the above 

 description, not having ever seen the shell. 



Kuster's figure represents no known American shell ; 

 there exists, however, a strong resemblance between it 

 and his figure of Alexia myosotis. His original specimen 

 may have been a variety of that species. 



PfeifFer compares the species with Melampus infrequens 

 Ad. 



GENUS CARYCHIUM MULLER. 



Shell pupa-shaped, very thin, transparent, with but few whorls ; aper- 

 ture suboval ; with one dentiform columellar fold, sometimes obsolete ; 

 parietal wall with 1 or 2 teeth ; peristome expanded, terminations not 

 approximating, the right hand one with one internal tooth. (Pfr.) 



See the remarks under the following species. 



CARYCHIUM EXIGUUM SAY. 



PLATE LIII. FIGURE 1. 



C. testa minutissima, alba, fusiformi, sub-aeuminata ; anfractibus quin- 

 que vel sex, obliquis, convexis ; apertura obliqua ; columella dente albo 

 ornata ; labro albo, reflexo. 



SYNONYMS AND REFERENCES. 



Pupa exigua SAY, Journ. Acad. ii. 375; ed. Binn. p. 26. 



GOULD, Boston Journ. iii. 398, pi. 3, f. 20. Invertebrata, 191, 



f. 120. 



DEKAY, New York Keport, 31 ; Fauna, 49, pi. iv. fig. 46. 

 ADAMS, Vermont Mollusca, 8. 

 Bulimus exiguus BINNEY, ii. 286. 

 Carychium exiguum GOULD, in Terr. Moll. ii. 286. 



CHEMNITZ, ed. 2, p. 61, pi. i. figs. 13, 14. 

 STIMPSON, Shells of N. E. p. 52, (absq. desc.) 

 FRAUENFELD, 1847, Akad. der Wiss. xix. p. 79; Zool. Bot. 



Wien, iv. p. 10, pi. 1, fig. 1. 

 BOUUGIGNAT, Mag. Zool. 1857, p. 209. 

 Carychium exile H. C. LEA, Am. Journ. 42, 109, pi. i. fig. 5. 



TROSCHEL, Ar. f. Nat. 1843; ii. 128. 

 Carychium existelium BOURGIGNAT, 1. c. p. 220. 

 Carycliium euphceum BOURGIGNAT, 1. c. p. 221. 



