108 LIMN^A. 



27. LIMN^A ADELINE, Tnjon. 



Plate 18, fig. 6. 



Shell thin, semi-transparent, body whorl 

 large, wide, convex ; spire small, consisting of 

 five convex volutions, attenuating rapidly to 

 an acute apex, sutures impressed; inner lip 

 thin, reflected, but not covering the umbilical 

 fissure, which is narrow ; columella twisted ; 

 color light horn, polished within the aperture, 

 outer lip tinged with red within. 



Length 14, diam. 8*5 mill. 



San Francisco, and other localities in Cali- 

 fornia. 



This 'shell is nearly allied io L. catascopium, 

 Say, but it may be distinguished by being more 

 fragile, more transverse, with a smaller, more 

 rapidly attenuating spire, but principally by 

 the presence of an umbilical fissure, which in 

 catascopium is entirely concealed by the ap- 

 pression of the labium. 



(82) 



