107 
LUCINS: mite 
TAB. DLVI.—fig. 1. 
Spec. Cuar. Orbicular, convex, ornamented with 
minute, longitudinal strie,and numerous small, 
regular, concentric lamin; lunette oval, very 
concave ; cardinal teeth obscure ; no lateral 
tooth. 
Lucina mitis, Deshayes MSS. 
Tue concentric lamine are beautifully regular, the spaces 
between them are crossed by minute irregular strie: 
within, the surface is rough, but not marked with sunken 
puntums, as many of the genus are; it is in these two 
characters we conceive this species to differ from L. ele- 
gans (Deshayes, i. p. 101, t. 14, f. 10, 11.), of which we 
have no authentic specimen. Specimens of L. mitis, 
sent us by Mons. Deshayes, agree precisely with the 
shell before us. 
Found abundantly in Barton Cliff by Miss Bemister. 
